diff --git a/package-lock.json b/package-lock.json
index 264ac0b59c..d47dcccb58 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,22 +7,174 @@
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-			"dev": true,
 			"requires": {
 				"@babel/highlight": "^7.10.4"
 			}
 		},
+		"@babel/core": {
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+			"resolved": "https://registry.npmjs.org/@babel/core/-/core-7.11.6.tgz",
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+				"@babel/helper-module-transforms": "^7.11.0",
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 		"@babel/helper-validator-identifier": {
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+		},
+		"@babel/helpers": {
+			"version": "7.10.4",
+			"resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.10.4.tgz",
+			"integrity": "sha512-L2gX/XeUONeEbI78dXSrJzGdz4GQ+ZTA/aazfUsFaWjSe95kiCuOZ5HsXvkiw3iwF+mFHSRUfJU8t6YavocdXA==",
+			"requires": {
+				"@babel/template": "^7.10.4",
+				"@babel/traverse": "^7.10.4",
+				"@babel/types": "^7.10.4"
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@@ -33,7 +185,6 @@
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@@ -42,7 +193,6 @@
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@@ -53,7 +203,6 @@
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@@ -61,26 +210,94 @@
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-					"integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
-					"dev": true
+					"integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU="
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 				"has-flag": {
 					"version": "3.0.0",
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-					"integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
-					"dev": true
+					"integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0="
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 				"supports-color": {
 					"version": "5.5.0",
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-					"dev": true,
 					"requires": {
 						"has-flag": "^3.0.0"
 					}
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 		},
+		"@babel/parser": {
+			"version": "7.11.5",
+			"resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.11.5.tgz",
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+			"version": "7.10.4",
+			"resolved": "https://registry.npmjs.org/@babel/template/-/template-7.10.4.tgz",
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+				"globals": "^11.1.0",
+				"lodash": "^4.17.19"
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+					"requires": {
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+				"lodash": "^4.17.19",
+				"to-fast-properties": "^2.0.0"
+			}
+		},
+		"@ethereumjs/config-nyc": {
+			"version": "1.1.1",
+			"resolved": "https://registry.npmjs.org/@ethereumjs/config-nyc/-/config-nyc-1.1.1.tgz",
+			"integrity": "sha512-R5OlffNms1Ae8I/OXf8BJ/fUzpRrL3XkQaBm19Yaq4BoeSNR9qgBkMEbhxaMwvinwENsf8Z9XP6YKHT3kvckkw=="
+		},
+		"@ethereumjs/config-prettier": {
+			"version": "1.1.1",
+			"resolved": "https://registry.npmjs.org/@ethereumjs/config-prettier/-/config-prettier-1.1.1.tgz",
+			"integrity": "sha512-ue3mZWRBE1nvUwamlwaYyBcRmTILbXgu9H0f1fBqOS9e5XDOFbVLX/prPdyrAqQEXvJf/Qs6kTVqXv3Yd8zBGQ=="
+		},
+		"@ethereumjs/config-tsc": {
+			"version": "1.1.1",
+			"resolved": "https://registry.npmjs.org/@ethereumjs/config-tsc/-/config-tsc-1.1.1.tgz",
+			"integrity": "sha512-3ye6Nb+csMMSjUzY+AweIZW7FvrSGG694MJEkI/Ti2iBCt+iXLzO5BAs1c9Bl+QZcpYuaupgrV/iHr8MXL07WQ=="
+		},
+		"@ethereumjs/config-tslint": {
+			"version": "1.1.1",
+			"resolved": "https://registry.npmjs.org/@ethereumjs/config-tslint/-/config-tslint-1.1.1.tgz",
+			"integrity": "sha512-3Z6M16l20rDRptCOFuKxsn9uypkdNE+5S768ICSbe5KgoyPLjPiHRaSdo76FkFwK5JO6X1Cx5+3tbyDUMBb1jA=="
+		},
 		"@evocateur/libnpmaccess": {
 			"version": "3.1.2",
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@@ -193,6 +410,11 @@
 				}
 			}
 		},
+		"@istanbuljs/schema": {
+			"version": "0.1.2",
+			"resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.2.tgz",
+			"integrity": "sha512-tsAQNx32a8CoFhjhijUIhI4kccIAgmGhy8LZMZgGfmXcpMbPRUqn5LWmgRttILi6yeGmBJd2xsPkFMs0PzgPCw=="
+		},
 		"@lerna/add": {
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 			"resolved": "https://registry.npmjs.org/@lerna/add/-/add-3.21.0.tgz",
@@ -1308,9 +1530,9 @@
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+			"version": "6.0.8",
+			"resolved": "https://registry.npmjs.org/@octokit/endpoint/-/endpoint-6.0.8.tgz",
+			"integrity": "sha512-MuRrgv+bM4Q+e9uEvxAB/Kf+Sj0O2JAOBA131uo1o6lgdq1iS8ejKwtqHgdfY91V3rN9R/hdGKFiQYMzVzVBEQ==",
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@@ -1481,11 +1703,33 @@
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-			"dev": true
+		"@types/abstract-leveldown": {
+			"version": "5.0.1",
+			"resolved": "https://registry.npmjs.org/@types/abstract-leveldown/-/abstract-leveldown-5.0.1.tgz",
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+		},
+		"@types/async": {
+			"version": "2.4.2",
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+		},
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@@ -5928,6 +12869,14 @@
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-			"dev": true
+			"integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
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@@ -7401,23 +15660,30 @@
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+		},
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 			"version": "4.0.2",
 			"resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
-			"integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
-			"dev": true
+			"integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
 		},
 		"y18n": {
 			"version": "4.0.0",
 			"resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
-			"integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w==",
-			"dev": true
+			"integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
 		},
 		"yallist": {
 			"version": "3.1.1",
 			"resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
-			"integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
-			"dev": true
+			"integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
 		},
 		"yaml": {
 			"version": "1.10.0",
@@ -7521,6 +15787,21 @@
 				"camelcase": "^5.0.0",
 				"decamelize": "^1.2.0"
 			}
+		},
+		"yeast": {
+			"version": "0.1.2",
+			"resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
+			"integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+		},
+		"yesno": {
+			"version": "0.0.1",
+			"resolved": "https://registry.npmjs.org/yesno/-/yesno-0.0.1.tgz",
+			"integrity": "sha1-/7wE/z1vmdrST3RjE06bkq5BvvY="
+		},
+		"yn": {
+			"version": "3.1.1",
+			"resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+			"integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q=="
 		}
 	}
 }
diff --git a/packages/account/package.json b/packages/account/package.json
index 5242defdfe..0d7fbf6327 100644
--- a/packages/account/package.json
+++ b/packages/account/package.json
@@ -36,7 +36,7 @@
   },
   "homepage": "https://github.com/ethereumjs/ethereumjs-vm/tree/master/packages/account#synopsis",
   "dependencies": {
-    "ethereumjs-util": "^7.0.5",
+    "ethereumjs-util": "^7.0.6",
     "rlp": "^2.2.3",
     "safe-buffer": "^5.1.1"
   },
diff --git a/packages/block/package.json b/packages/block/package.json
index e69987df72..c76ca28a4e 100644
--- a/packages/block/package.json
+++ b/packages/block/package.json
@@ -42,7 +42,7 @@
     "@ethereumjs/common": "^1.5.1",
     "@ethereumjs/tx": "^2.1.2",
     "@types/bn.js": "^4.11.6",
-    "ethereumjs-util": "^7.0.5",
+    "ethereumjs-util": "^7.0.6",
     "merkle-patricia-tree": "^4.0.0"
   },
   "devDependencies": {
diff --git a/packages/block/src/block.ts b/packages/block/src/block.ts
index 987b7363ea..0955b8ec81 100644
--- a/packages/block/src/block.ts
+++ b/packages/block/src/block.ts
@@ -1,200 +1,222 @@
 import { BaseTrie as Trie } from 'merkle-patricia-tree'
-import { BN, rlp, keccak256, KECCAK256_RLP, baToJSON } from 'ethereumjs-util'
+import { rlp, keccak256, KECCAK256_RLP } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
-import { Transaction } from '@ethereumjs/tx'
+import { Transaction, TxOptions } from '@ethereumjs/tx'
 import { BlockHeader } from './header'
-import { Blockchain, BlockData, BlockOptions } from './types'
+import { BlockData, BlockOptions, JsonBlock, BlockBuffer, Blockchain } from './types'
 
 /**
- * An object that represents the block
+ * An object that represents the block.
  */
 export class Block {
   public readonly header: BlockHeader
   public readonly transactions: Transaction[] = []
   public readonly uncleHeaders: BlockHeader[] = []
   public readonly txTrie = new Trie()
-
   public readonly _common: Common
 
-  /**
-   * Creates a new block object
-   *
-   * Please solely use this constructor to pass in block header data
-   * and don't modfiy header data after initialization since this can lead to
-   * undefined behavior regarding HF rule implemenations within the class.
-   *
-   * @param data - The block's data.
-   * @param options - The options for this block (like the chain setup)
-   */
-  constructor(
-    data: Buffer | [Buffer[], Buffer[], Buffer[]] | BlockData = {},
-    options: BlockOptions = {},
-  ) {
-    // Checking at runtime, to prevent errors down the path for JavaScript consumers.
-    if (data === null) {
-      data = {}
-    }
+  public static fromBlockData(blockData: BlockData = {}, opts: BlockOptions = {}) {
+    const { header: headerData, transactions: txsData, uncleHeaders: uhsData } = blockData
 
-    let rawTransactions
-    let rawUncleHeaders
+    const header = BlockHeader.fromHeaderData(headerData, opts)
 
-    if (Buffer.isBuffer(data)) {
-      // We do this to silence a TS error. We know that after this statement, data is
-      // a [Buffer[], Buffer[], Buffer[]]
-      const dataAsAny = rlp.decode(data) as any
-      data = dataAsAny as [Buffer[], Buffer[], Buffer[]]
+    // parse transactions
+    const transactions = []
+    for (const txData of txsData || []) {
+      const tx = Transaction.fromTxData(txData, opts as TxOptions)
+      transactions.push(tx)
     }
 
-    // Initialize the block header
-    if (Array.isArray(data)) {
-      this.header = new BlockHeader(data[0], options)
-      rawTransactions = data[1]
-      rawUncleHeaders = data[2]
-    } else {
-      this.header = new BlockHeader(data.header, options)
-      rawTransactions = data.transactions || []
-      rawUncleHeaders = data.uncleHeaders || []
+    // parse uncle headers
+    const uncleHeaders = []
+    for (const uhData of uhsData || []) {
+      const uh = BlockHeader.fromHeaderData(uhData, opts)
+      uncleHeaders.push(uh)
     }
-    this._common = this.header._common
 
-    // parse uncle headers
-    for (let i = 0; i < rawUncleHeaders.length; i++) {
-      this.uncleHeaders.push(new BlockHeader(rawUncleHeaders[i], options))
+    return new Block(header, transactions, uncleHeaders)
+  }
+
+  public static fromRLPSerializedBlock(serialized: Buffer, opts: BlockOptions = {}) {
+    const values = (rlp.decode(serialized) as any) as BlockBuffer
+
+    if (!Array.isArray(values)) {
+      throw new Error('Invalid serialized block input. Must be array')
     }
 
+    return Block.fromValuesArray(values, opts)
+  }
+
+  public static fromValuesArray(values: BlockBuffer, opts: BlockOptions = {}) {
+    if (values.length > 3) {
+      throw new Error('invalid block. More values than expected were received')
+    }
+
+    const [headerData, txsData, uhsData] = values
+
+    const header = BlockHeader.fromValuesArray(headerData, opts)
+
     // parse transactions
-    const txOpts = { common: this._common }
-    for (let i = 0; i < rawTransactions.length; i++) {
-      const txData = rawTransactions[i]
-      const tx = Array.isArray(txData)
-        ? Transaction.fromValuesArray(txData as Buffer[], txOpts)
-        : Transaction.fromRlpSerializedTx(txData as Buffer, txOpts)
-      this.transactions.push(tx)
+    const transactions = []
+    for (const txData of txsData || []) {
+      transactions.push(Transaction.fromValuesArray(txData, opts))
     }
+
+    // parse uncle headers
+    const uncleHeaders = []
+    for (const uncleHeaderData of uhsData || []) {
+      uncleHeaders.push(BlockHeader.fromValuesArray(uncleHeaderData, opts))
+    }
+
+    return new Block(header, transactions, uncleHeaders)
+  }
+
+  /**
+   * Alias for Block.fromBlockData() with initWithGenesisHeader set to true.
+   */
+  public static genesis(blockData: BlockData = {}, opts: BlockOptions = {}) {
+    opts = { ...opts, initWithGenesisHeader: true }
+    return Block.fromBlockData(blockData, opts)
+  }
+
+  /**
+   * This constructor takes the values, validates them, assigns them and freezes the object.
+   * Use the static factory methods to assist in creating a Block object from varying data types and options.
+   */
+  constructor(
+    header?: BlockHeader,
+    transactions: Transaction[] = [],
+    uncleHeaders: BlockHeader[] = [],
+    opts: BlockOptions = {},
+  ) {
+    this.header = header || BlockHeader.fromHeaderData({}, opts)
+    this.transactions = transactions
+    this.uncleHeaders = uncleHeaders
+    this._common = this.header._common
+
+    Object.freeze(this)
   }
 
-  get raw(): [Buffer[], Buffer[], Buffer[]] {
-    return this.serialize(false)
+  /**
+   *  Returns a Buffer Array of the raw Buffers of this block, in order.
+   */
+  raw(): BlockBuffer {
+    return [
+      this.header.raw(),
+      this.transactions.map((tx) => tx.raw()),
+      this.uncleHeaders.map((uh) => uh.raw()),
+    ]
   }
 
   /**
-   * Produces a hash the RLP of the block
+   * Produces a hash the RLP of the block.
    */
   hash(): Buffer {
     return this.header.hash()
   }
 
   /**
-   * Determines if this block is the genesis block
+   * Determines if this block is the genesis block.
    */
   isGenesis(): boolean {
     return this.header.isGenesis()
   }
 
   /**
-   * Produces a serialization of the block.
-   *
-   * @param rlpEncode - If `true`, the returned object is the RLP encoded data as seen by the
-   * Ethereum wire protocol. If `false`, a tuple with the raw data of the header, the txs and the
-   * uncle headers is returned.
+   * Returns the rlp encoding of the block.
    */
-  serialize(): Buffer
-  serialize(rlpEncode: true): Buffer
-  serialize(rlpEncode: false): [Buffer[], Buffer[], Buffer[]]
-  serialize(rlpEncode = true) {
-    const raw = [
-      this.header.raw,
-      this.transactions.map((tx) => tx.serialize()),
-      this.uncleHeaders.map((uh) => uh.raw),
-    ]
-
-    return rlpEncode ? rlp.encode(raw) : raw
+  serialize(): Buffer {
+    return rlp.encode(this.raw())
   }
 
   /**
-   * Generate transaction trie. The tx trie must be generated before the transaction trie can
-   * be validated with `validateTransactionTrie`
+   * Generates transaction trie for validation.
    */
   async genTxTrie(): Promise<void> {
-    for (let i = 0; i < this.transactions.length; i++) {
-      const tx = this.transactions[i]
-      await this._putTxInTrie(i, tx)
+    const { transactions, txTrie } = this
+    for (let i = 0; i < transactions.length; i++) {
+      const tx = transactions[i]
+      const key = rlp.encode(i)
+      const value = tx.serialize()
+      await txTrie.put(key, value)
     }
   }
 
   /**
-   * Validates the transaction trie
+   * Validates the transaction trie.
    */
-  validateTransactionsTrie(): boolean {
-    if (this.transactions.length) {
-      return this.header.transactionsTrie.equals(this.txTrie.root)
-    } else {
+  async validateTransactionsTrie(): Promise<boolean> {
+    if (this.transactions.length === 0) {
       return this.header.transactionsTrie.equals(KECCAK256_RLP)
     }
+
+    if (this.txTrie.root.equals(KECCAK256_RLP)) {
+      await this.genTxTrie()
+    }
+
+    return this.txTrie.root.equals(this.header.transactionsTrie)
   }
 
   /**
-   * Validates the transactions
+   * Validates the transactions.
    *
    * @param stringError - If `true`, a string with the indices of the invalid txs is returned.
    */
   validateTransactions(): boolean
   validateTransactions(stringError: false): boolean
-  validateTransactions(stringError: true): string
+  validateTransactions(stringError: true): string[]
   validateTransactions(stringError = false) {
     const errors: string[] = []
 
     this.transactions.forEach(function (tx, i) {
       const errs = tx.validate(true)
-      if (errs.length !== 0) {
+      if (errs.length > 0) {
         errors.push(`errors at tx ${i}: ${errs.join(', ')}`)
       }
     })
 
-    return stringError ? errors.join(' ') : errors.length === 0
+    return stringError ? errors : errors.length === 0
   }
 
   /**
-   * Validates the entire block, throwing if invalid.
+   * Validates the block, throwing if invalid.
    *
-   * @param blockchain - the blockchain that this block wants to be part of
+   * @param blockchain - additionally validate against a @ethereumjs/blockchain
    */
-  async validate(blockchain: Blockchain): Promise<void> {
-    await Promise.all([
-      this.validateUncles(blockchain),
-      this.genTxTrie(),
-      this.header.validate(blockchain),
-    ])
-
-    if (!this.validateTransactionsTrie()) {
-      throw new Error('invalid transaction trie')
-    }
+  async validate(blockchain?: Blockchain): Promise<void> {
+    await this.header.validate(blockchain)
 
     const txErrors = this.validateTransactions(true)
-    if (txErrors !== '') {
-      throw new Error(txErrors)
+    if (txErrors.length > 0) {
+      throw new Error(`invalid transactions: ${txErrors.join(' ')}`)
+    }
+
+    const validateTxTrie = await this.validateTransactionsTrie()
+    if (!validateTxTrie) {
+      throw new Error('invalid transaction trie')
     }
 
+    await this.validateUncles(blockchain)
+
     if (!this.validateUnclesHash()) {
       throw new Error('invalid uncle hash')
     }
   }
 
   /**
-   * Validates the uncle's hash
+   * Validates the uncle's hash.
    */
   validateUnclesHash(): boolean {
-    const raw = rlp.encode(this.uncleHeaders.map((uh) => uh.raw))
-
+    const raw = rlp.encode(this.uncleHeaders.map((uh) => uh.raw()))
     return keccak256(raw).equals(this.header.uncleHash)
   }
 
   /**
    * Validates the uncles that are in the block, if any. This method throws if they are invalid.
    *
-   * @param blockchain - the blockchain that this block wants to be part of
+   * @param blockchain - additionally validate against a @ethereumjs/blockchain
    */
-  async validateUncles(blockchain: Blockchain): Promise<void> {
+  async validateUncles(blockchain?: Blockchain): Promise<void> {
     if (this.isGenesis()) {
       return
     }
@@ -204,43 +226,31 @@ export class Block {
     }
 
     const uncleHashes = this.uncleHeaders.map((header) => header.hash().toString('hex'))
-
     if (!(new Set(uncleHashes).size === uncleHashes.length)) {
       throw new Error('duplicate uncles')
     }
 
-    await Promise.all(
-      this.uncleHeaders.map(async (uh) => this._validateUncleHeader(uh, blockchain)),
-    )
+    for (const uh of this.uncleHeaders) {
+      await this._validateUncleHeader(uh, blockchain)
+    }
   }
 
   /**
-   * Returns the block in JSON format
-   *
-   * @see {@link https://github.com/ethereumjs/ethereumjs-util/blob/master/docs/index.md#defineproperties|ethereumjs-util}
+   * Returns the block in JSON format.
    */
-  toJSON(labeled: boolean = false) {
-    if (labeled) {
-      return {
-        header: this.header.toJSON(true),
-        transactions: this.transactions.map((tx) => tx.toJSON()),
-        uncleHeaders: this.uncleHeaders.forEach((uh) => uh.toJSON(true)),
-      }
-    } else {
-      return baToJSON(this.raw)
+  toJSON(): JsonBlock {
+    return {
+      header: this.header.toJSON(),
+      transactions: this.transactions.map((tx) => tx.toJSON()),
+      uncleHeaders: this.uncleHeaders.map((uh) => uh.toJSON()),
     }
   }
 
-  private async _putTxInTrie(txIndex: number, tx: Transaction) {
-    await this.txTrie.put(rlp.encode(txIndex), tx.serialize())
-  }
-
-  private _validateUncleHeader(uncleHeader: BlockHeader, blockchain: Blockchain) {
+  private _validateUncleHeader(uncleHeader: BlockHeader, blockchain?: Blockchain) {
     // TODO: Validate that the uncle header hasn't been included in the blockchain yet.
     // This is not possible in ethereumjs-blockchain since this PR was merged:
     // https://github.com/ethereumjs/ethereumjs-blockchain/pull/47
-
-    const height = new BN(this.header.number)
+    const height = this.header.number
     return uncleHeader.validate(blockchain, height)
   }
 }
diff --git a/packages/block/src/from-rpc.ts b/packages/block/src/from-rpc.ts
index c83c2bfee2..af8a5db2ba 100644
--- a/packages/block/src/from-rpc.ts
+++ b/packages/block/src/from-rpc.ts
@@ -1,5 +1,5 @@
 import { Transaction, TxData } from '@ethereumjs/tx'
-import { toBuffer, setLengthLeft, Address } from 'ethereumjs-util'
+import { toBuffer, setLengthLeft } from 'ethereumjs-util'
 import { Block, BlockOptions } from './index'
 
 import blockHeaderFromRpc from './header-from-rpc'
@@ -11,47 +11,22 @@ import blockHeaderFromRpc from './header-from-rpc'
  * @param uncles - Optional list of Ethereum JSON RPC of uncles (eth_getUncleByBlockHashAndIndex)
  * @param chainOptions - An object describing the blockchain
  */
-export default function blockFromRpc(blockParams: any, uncles?: any[], options?: BlockOptions) {
-  uncles = uncles || []
-
+export default function blockFromRpc(blockParams: any, uncles: any[] = [], options?: BlockOptions) {
   const header = blockHeaderFromRpc(blockParams, options)
 
-  const block = new Block(
-    {
-      header: header.toJSON(true),
-      transactions: [],
-      uncleHeaders: uncles.map((uh) => blockHeaderFromRpc(uh, options).toJSON(true)),
-    },
-    options,
-  )
-
+  const transactions: Transaction[] = []
   if (blockParams.transactions) {
-    const txOpts = { common: (<any>block)._common }
-
+    const opts = { common: header._common }
     for (const _txParams of blockParams.transactions) {
       const txParams = normalizeTxParams(_txParams)
-
-      // override from address
-      const fromAddress = txParams.from ? Address.fromString(txParams.from) : Address.zero()
-      delete txParams.from
-
-      const tx = Transaction.fromTxData(txParams as TxData, txOpts)
-      const fakeTx = Object.create(tx)
-
-      // override getSenderAddress
-      fakeTx.getSenderAddress = () => {
-        return fromAddress
-      }
-      // override hash
-      fakeTx.hash = () => {
-        return toBuffer(txParams.hash)
-      }
-
-      block.transactions.push(fakeTx)
+      const tx = Transaction.fromTxData(txParams as TxData, opts)
+      transactions.push(tx)
     }
   }
 
-  return block
+  const uncleHeaders = uncles.map((uh) => blockHeaderFromRpc(uh, options))
+
+  return Block.fromBlockData({ header, transactions, uncleHeaders })
 }
 
 function normalizeTxParams(_txParams: any) {
diff --git a/packages/block/src/header-from-rpc.ts b/packages/block/src/header-from-rpc.ts
index 82b457b0b5..e28329873e 100644
--- a/packages/block/src/header-from-rpc.ts
+++ b/packages/block/src/header-from-rpc.ts
@@ -1,5 +1,4 @@
 import { BlockHeader } from './header'
-import { KECCAK256_NULL, toBuffer } from 'ethereumjs-util'
 import { BlockOptions } from './types'
 
 /**
@@ -9,31 +8,45 @@ import { BlockOptions } from './types'
  * @param chainOptions - An object describing the blockchain
  */
 export default function blockHeaderFromRpc(blockParams: any, options?: BlockOptions) {
-  const blockHeader = new BlockHeader(
+  const {
+    parentHash,
+    sha3Uncles,
+    miner,
+    stateRoot,
+    transactionsRoot,
+    receiptRoot,
+    receiptsRoot,
+    logsBloom,
+    difficulty,
+    number,
+    gasLimit,
+    gasUsed,
+    timestamp,
+    extraData,
+    mixHash,
+    nonce,
+  } = blockParams
+
+  const blockHeader = BlockHeader.fromHeaderData(
     {
-      parentHash: blockParams.parentHash,
-      uncleHash: blockParams.sha3Uncles,
-      coinbase: blockParams.miner,
-      stateRoot: blockParams.stateRoot,
-      transactionsTrie: blockParams.transactionsRoot,
-      receiptTrie: blockParams.receiptRoot || blockParams.receiptsRoot || KECCAK256_NULL,
-      bloom: blockParams.logsBloom,
-      difficulty: blockParams.difficulty,
-      number: blockParams.number,
-      gasLimit: blockParams.gasLimit,
-      gasUsed: blockParams.gasUsed,
-      timestamp: blockParams.timestamp,
-      extraData: blockParams.extraData,
-      mixHash: blockParams.mixHash,
-      nonce: blockParams.nonce,
+      parentHash,
+      uncleHash: sha3Uncles,
+      coinbase: miner,
+      stateRoot,
+      transactionsTrie: transactionsRoot,
+      receiptTrie: receiptRoot || receiptsRoot,
+      bloom: logsBloom,
+      difficulty,
+      number,
+      gasLimit,
+      gasUsed,
+      timestamp,
+      extraData,
+      mixHash,
+      nonce,
     },
     options,
   )
 
-  // override hash in case something was missing
-  blockHeader.hash = function () {
-    return toBuffer(blockParams.hash)
-  }
-
   return blockHeader
 }
diff --git a/packages/block/src/header.ts b/packages/block/src/header.ts
index 69ef06eb91..2de1ba4a7c 100644
--- a/packages/block/src/header.ts
+++ b/packages/block/src/header.ts
@@ -1,155 +1,263 @@
 import Common from '@ethereumjs/common'
 import {
+  Address,
   BN,
-  zeros,
   KECCAK256_RLP_ARRAY,
   KECCAK256_RLP,
-  toBuffer,
-  defineProperties,
-  bufferToInt,
+  rlp,
   rlphash,
+  toBuffer,
+  unpadBuffer,
+  zeros,
 } from 'ethereumjs-util'
-import { Blockchain, BlockHeaderData, BufferLike, BlockOptions, PrefixedHexString } from './types'
-import { Buffer } from 'buffer'
+import {
+  HeaderData,
+  JsonHeader,
+  BlockHeaderBuffer,
+  Blockchain,
+  BlockOptions,
+  bnToHex,
+} from './types'
 import { Block } from './block'
 
+const DEFAULT_GAS_LIMIT = new BN(Buffer.from('ffffffffffffff', 'hex'))
+
 /**
- * An object that represents the block header
+ * An object that represents the block header.
  */
 export class BlockHeader {
-  public raw!: Buffer[]
-  public parentHash!: Buffer
-  public uncleHash!: Buffer
-  public coinbase!: Buffer
-  public stateRoot!: Buffer
-  public transactionsTrie!: Buffer
-  public receiptTrie!: Buffer
-  public bloom!: Buffer
-  public difficulty!: Buffer
-  public number!: Buffer
-  public gasLimit!: Buffer
-  public gasUsed!: Buffer
-  public timestamp!: Buffer
-  public extraData!: Buffer
-  public mixHash!: Buffer
-  public nonce!: Buffer
+  public readonly parentHash: Buffer
+  public readonly uncleHash: Buffer
+  public readonly coinbase: Address
+  public readonly stateRoot: Buffer
+  public readonly transactionsTrie: Buffer
+  public readonly receiptTrie: Buffer
+  public readonly bloom: Buffer
+  public readonly difficulty: BN
+  public readonly number: BN
+  public readonly gasLimit: BN
+  public readonly gasUsed: BN
+  public readonly timestamp: BN
+  public readonly extraData: Buffer
+  public readonly mixHash: Buffer
+  public readonly nonce: Buffer
 
   public readonly _common: Common
 
+  public static fromHeaderData(headerData: HeaderData = {}, opts: BlockOptions = {}) {
+    const {
+      parentHash,
+      uncleHash,
+      coinbase,
+      stateRoot,
+      transactionsTrie,
+      receiptTrie,
+      bloom,
+      difficulty,
+      number,
+      gasLimit,
+      gasUsed,
+      timestamp,
+      extraData,
+      mixHash,
+      nonce,
+    } = headerData
+
+    return new BlockHeader(
+      parentHash ? toBuffer(parentHash) : zeros(32),
+      uncleHash ? toBuffer(uncleHash) : KECCAK256_RLP_ARRAY,
+      coinbase ? new Address(toBuffer(coinbase)) : Address.zero(),
+      stateRoot ? toBuffer(stateRoot) : zeros(32),
+      transactionsTrie ? toBuffer(transactionsTrie) : KECCAK256_RLP,
+      receiptTrie ? toBuffer(receiptTrie) : KECCAK256_RLP,
+      bloom ? toBuffer(bloom) : zeros(256),
+      difficulty ? new BN(toBuffer(difficulty)) : new BN(0),
+      number ? new BN(toBuffer(number)) : new BN(0),
+      gasLimit ? new BN(toBuffer(gasLimit)) : DEFAULT_GAS_LIMIT,
+      gasUsed ? new BN(toBuffer(gasUsed)) : new BN(0),
+      timestamp ? new BN(toBuffer(timestamp)) : new BN(0),
+      extraData ? toBuffer(extraData) : Buffer.from([]),
+      mixHash ? toBuffer(mixHash) : zeros(32),
+      nonce ? toBuffer(nonce) : zeros(8),
+      opts,
+    )
+  }
+
+  public static fromRLPSerializedHeader(serialized: Buffer, opts: BlockOptions) {
+    const values = rlp.decode(serialized)
+
+    if (!Array.isArray(values)) {
+      throw new Error('Invalid serialized header input. Must be array')
+    }
+
+    return BlockHeader.fromValuesArray(values, opts)
+  }
+
+  public static fromValuesArray(values: BlockHeaderBuffer, opts: BlockOptions) {
+    if (values.length > 15) {
+      throw new Error('invalid header. More values than expected were received')
+    }
+
+    const [
+      parentHash,
+      uncleHash,
+      coinbase,
+      stateRoot,
+      transactionsTrie,
+      receiptTrie,
+      bloom,
+      difficulty,
+      number,
+      gasLimit,
+      gasUsed,
+      timestamp,
+      extraData,
+      mixHash,
+      nonce,
+    ] = values
+
+    return new BlockHeader(
+      toBuffer(parentHash),
+      toBuffer(uncleHash),
+      new Address(toBuffer(coinbase)),
+      toBuffer(stateRoot),
+      toBuffer(transactionsTrie),
+      toBuffer(receiptTrie),
+      toBuffer(bloom),
+      new BN(toBuffer(difficulty)),
+      new BN(toBuffer(number)),
+      new BN(toBuffer(gasLimit)),
+      new BN(toBuffer(gasUsed)),
+      new BN(toBuffer(timestamp)),
+      toBuffer(extraData),
+      toBuffer(mixHash),
+      toBuffer(nonce),
+      opts,
+    )
+  }
+
   /**
-   * Creates a new block header.
-   *
-   * Please solely use this constructor to pass in block header data
-   * and don't modfiy header data after initialization since this can lead to
-   * undefined behavior regarding HF rule implemenations within the class.
-   *
-   * @param data - The data of the block header.
-   * @param opts - The network options for this block, and its header, uncle headers and txs.
+   * Alias for Header.fromHeaderData() with initWithGenesisHeader set to true.
+   */
+  public static genesis(headerData: HeaderData = {}, opts: BlockOptions = {}) {
+    opts = { ...opts, initWithGenesisHeader: true }
+    return BlockHeader.fromHeaderData(headerData, opts)
+  }
+
+  /**
+   * This constructor takes the values, validates them, assigns them and freezes the object.
+   * Use the public static factory methods to assist in creating a Header object from
+   * varying data types.
+   * For a default empty header, use `BlockHeader.fromHeaderData()`.
    */
   constructor(
-    data: Buffer | PrefixedHexString | BufferLike[] | BlockHeaderData = {},
+    parentHash: Buffer,
+    uncleHash: Buffer,
+    coinbase: Address,
+    stateRoot: Buffer,
+    transactionsTrie: Buffer,
+    receiptTrie: Buffer,
+    bloom: Buffer,
+    difficulty: BN,
+    number: BN,
+    gasLimit: BN,
+    gasUsed: BN,
+    timestamp: BN,
+    extraData: Buffer,
+    mixHash: Buffer,
+    nonce: Buffer,
     options: BlockOptions = {},
   ) {
-    // Throw on chain or hardfork options removed in latest major release
-    // to prevent implicit chain setup on a wrong chain
-    if ('chain' in options || 'hardfork' in options) {
-      throw new Error('Chain/hardfork options are not allowed any more on initialization')
-    }
-
     if (options.common) {
       this._common = options.common
     } else {
-      const DEFAULT_CHAIN = 'mainnet'
+      const chain = 'mainnet' // default
       if (options.initWithGenesisHeader) {
-        this._common = new Common({ chain: DEFAULT_CHAIN, hardfork: 'chainstart' })
+        this._common = new Common({ chain, hardfork: 'chainstart' })
       } else {
         // This initializes on the Common default hardfork
-        this._common = new Common({ chain: DEFAULT_CHAIN })
+        this._common = new Common({ chain })
       }
     }
-    const fields = [
-      {
-        name: 'parentHash',
-        length: 32,
-        default: zeros(32),
-      },
-      {
-        name: 'uncleHash',
-        default: KECCAK256_RLP_ARRAY,
-      },
-      {
-        name: 'coinbase',
-        length: 20,
-        default: zeros(20),
-      },
-      {
-        name: 'stateRoot',
-        length: 32,
-        default: zeros(32),
-      },
-      {
-        name: 'transactionsTrie',
-        length: 32,
-        default: KECCAK256_RLP,
-      },
-      {
-        name: 'receiptTrie',
-        length: 32,
-        default: KECCAK256_RLP,
-      },
-      {
-        name: 'bloom',
-        default: zeros(256),
-      },
-      {
-        name: 'difficulty',
-        default: Buffer.from([]),
-      },
-      {
-        name: 'number',
-        // TODO: params.homeSteadForkNumber.v left for legacy reasons, replace on future release
-        default: toBuffer(1150000),
-      },
-      {
-        name: 'gasLimit',
-        default: Buffer.from('ffffffffffffff', 'hex'),
-      },
-      {
-        name: 'gasUsed',
-        empty: true,
-        default: Buffer.from([]),
-      },
-      {
-        name: 'timestamp',
-        default: Buffer.from([]),
-      },
-      {
-        name: 'extraData',
-        allowZero: true,
-        empty: true,
-        default: Buffer.from([]),
-      },
-      {
-        name: 'mixHash',
-        default: zeros(32),
-        // length: 32
-      },
-      {
-        name: 'nonce',
-        default: zeros(8), // sha3(42)
-      },
-    ]
-    defineProperties(this, fields, data)
 
     if (options.hardforkByBlockNumber) {
-      this._common.setHardforkByBlockNumber(bufferToInt(this.number))
+      this._common.setHardforkByBlockNumber(number.toNumber())
     }
 
     if (options.initWithGenesisHeader) {
-      this._setGenesisParams()
+      if (this._common.hardfork() !== 'chainstart') {
+        throw new Error(
+          'Genesis parameters can only be set with a Common instance set to chainstart',
+        )
+      }
+      number = new BN(0)
+      if (gasLimit.eq(DEFAULT_GAS_LIMIT)) {
+        gasLimit = new BN(toBuffer(this._common.genesis().gasLimit))
+      }
+      if (timestamp.isZero()) {
+        timestamp = new BN(toBuffer(this._common.genesis().timestamp))
+      }
+      if (difficulty.isZero()) {
+        difficulty = new BN(toBuffer(this._common.genesis().difficulty))
+      }
+      if (extraData.length === 0) {
+        extraData = toBuffer(this._common.genesis().extraData)
+      }
+      if (nonce.equals(zeros(8))) {
+        nonce = toBuffer(this._common.genesis().nonce)
+      }
+      if (stateRoot.equals(zeros(32))) {
+        stateRoot = toBuffer(this._common.genesis().stateRoot)
+      }
     }
 
+    this.parentHash = parentHash
+    this.uncleHash = uncleHash
+    this.coinbase = coinbase
+    this.stateRoot = stateRoot
+    this.transactionsTrie = transactionsTrie
+    this.receiptTrie = receiptTrie
+    this.bloom = bloom
+    this.difficulty = difficulty
+    this.number = number
+    this.gasLimit = gasLimit
+    this.gasUsed = gasUsed
+    this.timestamp = timestamp
+    this.extraData = extraData
+    this.mixHash = mixHash
+    this.nonce = nonce
+
+    this._validateBufferLengths()
     this._checkDAOExtraData()
+
+    Object.freeze(this)
+  }
+
+  /**
+   * Validates correct buffer lengths, throws if invalid.
+   */
+  _validateBufferLengths() {
+    const { parentHash, stateRoot, transactionsTrie, receiptTrie, mixHash, nonce } = this
+    if (parentHash.length !== 32) {
+      throw new Error(`parentHash must be 32 bytes, received ${parentHash.length} bytes`)
+    }
+    if (stateRoot.length !== 32) {
+      throw new Error(`stateRoot must be 32 bytes, received ${stateRoot.length} bytes`)
+    }
+    if (transactionsTrie.length !== 32) {
+      throw new Error(
+        `transactionsTrie must be 32 bytes, received ${transactionsTrie.length} bytes`,
+      )
+    }
+    if (receiptTrie.length !== 32) {
+      throw new Error(`receiptTrie must be 32 bytes, received ${receiptTrie.length} bytes`)
+    }
+    if (mixHash.length !== 32) {
+      throw new Error(`mixHash must be 32 bytes, received ${mixHash.length} bytes`)
+    }
+    if (nonce.length !== 8) {
+      throw new Error(`nonce must be 8 bytes, received ${nonce.length} bytes`)
+    }
   }
 
   /**
@@ -159,18 +267,17 @@ export class BlockHeader {
    */
   canonicalDifficulty(parentBlock: Block): BN {
     const hardfork = this._getHardfork()
-    const blockTs = new BN(this.timestamp)
-    const parentTs = new BN(parentBlock.header.timestamp)
-    const parentDif = new BN(parentBlock.header.difficulty)
+    const blockTs = this.timestamp
+    const { timestamp: parentTs, difficulty: parentDif } = parentBlock.header
     const minimumDifficulty = new BN(
       this._common.paramByHardfork('pow', 'minimumDifficulty', hardfork),
     )
     const offset = parentDif.div(
       new BN(this._common.paramByHardfork('pow', 'difficultyBoundDivisor', hardfork)),
     )
-    let num = new BN(this.number)
+    let num = this.number.clone()
 
-    // We use a ! here as TS can follow this hardforks-dependent logic, but it always gets assigned
+    // We use a ! here as TS cannot follow this hardfork-dependent logic, but it always gets assigned
     let dif!: BN
 
     if (this._common.hardforkGteHardfork(hardfork, 'byzantium')) {
@@ -225,7 +332,7 @@ export class BlockHeader {
       }
     }
 
-    const exp = num.idivn(100000).isubn(2)
+    const exp = num.divn(100000).isubn(2)
     if (!exp.isNeg()) {
       dif.iadd(new BN(2).pow(exp))
     }
@@ -243,8 +350,7 @@ export class BlockHeader {
    * @param parentBlock - this block's parent
    */
   validateDifficulty(parentBlock: Block): boolean {
-    const dif = this.canonicalDifficulty(parentBlock)
-    return dif.cmp(new BN(this.difficulty)) === 0
+    return this.canonicalDifficulty(parentBlock).eq(this.difficulty)
   }
 
   /**
@@ -253,15 +359,15 @@ export class BlockHeader {
    * @param parentBlock - this block's parent
    */
   validateGasLimit(parentBlock: Block): boolean {
-    const pGasLimit = new BN(parentBlock.header.gasLimit)
-    const gasLimit = new BN(this.gasLimit)
+    const parentGasLimit = parentBlock.header.gasLimit
+    const gasLimit = this.gasLimit
     const hardfork = this._getHardfork()
 
-    const a = pGasLimit.div(
+    const a = parentGasLimit.div(
       new BN(this._common.paramByHardfork('gasConfig', 'gasLimitBoundDivisor', hardfork)),
     )
-    const maxGasLimit = pGasLimit.add(a)
-    const minGasLimit = pGasLimit.sub(a)
+    const maxGasLimit = parentGasLimit.add(a)
+    const minGasLimit = parentGasLimit.sub(a)
 
     return (
       gasLimit.lt(maxGasLimit) &&
@@ -271,117 +377,134 @@ export class BlockHeader {
   }
 
   /**
-   * Validates the entire block header, throwing if invalid.
+   * Validates the block header, throwing if invalid.
    *
-   * @param blockchain - the blockchain that this block is validating against
+   * @param blockchain - additionally validate against a @ethereumjs/blockchain
    * @param height - If this is an uncle header, this is the height of the block that is including it
    */
-  async validate(blockchain: Blockchain, height?: BN): Promise<void> {
+  async validate(blockchain?: Blockchain, height?: BN): Promise<void> {
     if (this.isGenesis()) {
       return
     }
 
-    const parentBlock = await this._getBlockByHash(blockchain, this.parentHash)
-
-    if (parentBlock === undefined) {
-      throw new Error('could not find parent block')
+    const hardfork = this._getHardfork()
+    if (this.extraData.length > this._common.paramByHardfork('vm', 'maxExtraDataSize', hardfork)) {
+      throw new Error('invalid amount of extra data')
     }
 
-    const number = new BN(this.number)
-    if (number.cmp(new BN(parentBlock.header.number).iaddn(1)) !== 0) {
-      throw new Error('invalid number')
-    }
+    if (blockchain) {
+      const parentBlock = await this._getBlockByHash(blockchain, this.parentHash)
 
-    if (height !== undefined && BN.isBN(height)) {
-      const dif = height.sub(new BN(parentBlock.header.number))
-      if (!(dif.cmpn(8) === -1 && dif.cmpn(1) === 1)) {
-        throw new Error('uncle block has a parent that is too old or too young')
+      if (!parentBlock) {
+        throw new Error('could not find parent block')
       }
-    }
 
-    if (!this.validateDifficulty(parentBlock)) {
-      throw new Error('invalid Difficulty')
-    }
+      const { number } = this
+      if (!number.eq(parentBlock.header.number.addn(1))) {
+        throw new Error('invalid number')
+      }
 
-    if (!this.validateGasLimit(parentBlock)) {
-      throw new Error('invalid gas limit')
-    }
+      if (this.timestamp.lte(parentBlock.header.timestamp)) {
+        throw new Error('invalid timestamp')
+      }
 
-    if (bufferToInt(this.number) - bufferToInt(parentBlock.header.number) !== 1) {
-      throw new Error('invalid height')
-    }
+      if (!this.validateDifficulty(parentBlock)) {
+        throw new Error('invalid difficulty')
+      }
 
-    if (bufferToInt(this.timestamp) <= bufferToInt(parentBlock.header.timestamp)) {
-      throw new Error('invalid timestamp')
-    }
+      if (!this.validateGasLimit(parentBlock)) {
+        throw new Error('invalid gas limit')
+      }
 
-    const hardfork = this._getHardfork()
-    if (this.extraData.length > this._common.paramByHardfork('vm', 'maxExtraDataSize', hardfork)) {
-      throw new Error('invalid amount of extra data')
+      if (height) {
+        const dif = height.sub(parentBlock.header.number)
+        if (!(dif.cmpn(8) === -1 && dif.cmpn(1) === 1)) {
+          throw new Error('uncle block has a parent that is too old or too young')
+        }
+      }
     }
   }
 
   /**
-   * Returns the hash of the block header.
+   * Returns a Buffer Array of the raw Buffers in this header, in order.
    */
-  hash(): Buffer {
-    return rlphash(this.raw)
+  raw(): BlockHeaderBuffer {
+    return [
+      this.parentHash,
+      this.uncleHash,
+      this.coinbase.buf,
+      this.stateRoot,
+      this.transactionsTrie,
+      this.receiptTrie,
+      this.bloom,
+      unpadBuffer(toBuffer(this.difficulty)), // we unpadBuffer, because toBuffer(new BN(0)) == <Buffer 00>
+      unpadBuffer(toBuffer(this.number)),
+      unpadBuffer(toBuffer(this.gasLimit)),
+      unpadBuffer(toBuffer(this.gasUsed)),
+      unpadBuffer(toBuffer(this.timestamp)),
+      this.extraData,
+      this.mixHash,
+      this.nonce,
+    ]
   }
 
   /**
-   * Checks if the block header is a genesis header.
+   * Returns the hash of the block header.
    */
-  isGenesis(): boolean {
-    return this.number.length === 0
+  hash(): Buffer {
+    return rlphash(this.raw())
   }
 
   /**
-   * Turns the header into the canonical genesis block header.
+   * Checks if the block header is a genesis header.
    */
-  _setGenesisParams(): void {
-    if (this._common.hardfork() !== 'chainstart') {
-      throw new Error('Genesis parameters can only be set with a Common instance set to chainstart')
-    }
-    this.timestamp = this._common.genesis().timestamp
-    this.gasLimit = this._common.genesis().gasLimit
-    this.difficulty = this._common.genesis().difficulty
-    this.extraData = this._common.genesis().extraData
-    this.nonce = this._common.genesis().nonce
-    this.stateRoot = this._common.genesis().stateRoot
-    this.number = Buffer.from([])
+  isGenesis(): boolean {
+    return this.number.isZero()
   }
 
   /**
-   * Returns the rlp encoding of the block header
+   * Returns the rlp encoding of the block header.
    */
   serialize(): Buffer {
-    // Note: This never gets executed, defineProperties overwrites it.
-    return Buffer.from([])
+    return rlp.encode(this.raw())
   }
 
   /**
-   * Returns the block header in JSON format
-   *
-   * @see {@link https://github.com/ethereumjs/ethereumjs-util/blob/master/docs/index.md#defineproperties|ethereumjs-util}
+   * Returns the block header in JSON format.
    */
-  toJSON(_labels: boolean = false): { [key: string]: string } | string[] {
-    // Note: This never gets executed, defineProperties overwrites it.
-    return {}
+  toJSON(): JsonHeader {
+    return {
+      parentHash: '0x' + this.parentHash.toString('hex'),
+      uncleHash: '0x' + this.uncleHash.toString('hex'),
+      coinbase: this.coinbase.toString(),
+      stateRoot: '0x' + this.stateRoot.toString('hex'),
+      transactionsTrie: '0x' + this.transactionsTrie.toString('hex'),
+      receiptTrie: '0x' + this.receiptTrie.toString('hex'),
+      bloom: '0x' + this.bloom.toString('hex'),
+      difficulty: bnToHex(this.difficulty),
+      number: bnToHex(this.number),
+      gasLimit: bnToHex(this.gasLimit),
+      gasUsed: bnToHex(this.gasUsed),
+      timestamp: bnToHex(this.timestamp),
+      extraData: '0x' + this.extraData.toString('hex'),
+      mixHash: '0x' + this.mixHash.toString('hex'),
+      nonce: '0x' + this.nonce.toString('hex'),
+    }
   }
 
   private _getHardfork(): string {
-    const commonHardFork = this._common.hardfork()
-
-    return commonHardFork !== null
-      ? commonHardFork
-      : this._common.activeHardfork(bufferToInt(this.number))
+    return this._common.hardfork() || this._common.activeHardfork(this.number.toNumber())
   }
 
   private async _getBlockByHash(blockchain: Blockchain, hash: Buffer): Promise<Block | undefined> {
     try {
       return blockchain.getBlock(hash)
-    } catch (e) {
-      return undefined
+    } catch (error) {
+      if (error.type === 'NotFoundError') {
+        return undefined
+      } else {
+        throw error
+      }
     }
   }
 
@@ -391,15 +514,15 @@ export class BlockHeader {
    */
   private _checkDAOExtraData() {
     const DAO_ExtraData = Buffer.from('64616f2d686172642d666f726b', 'hex')
-    const DAO_ForceExtraDataRange = 9
+    const DAO_ForceExtraDataRange = new BN(9)
 
     if (this._common.hardforkIsActiveOnChain('dao')) {
       // verify the extraData field.
-      const blockNumber = new BN(this.number)
+      const blockNumber = this.number
       const DAOActivationBlock = new BN(this._common.hardforkBlock('dao'))
       if (blockNumber.gte(DAOActivationBlock)) {
         const drift = blockNumber.sub(DAOActivationBlock)
-        if (drift.lten(DAO_ForceExtraDataRange)) {
+        if (drift.lte(DAO_ForceExtraDataRange)) {
           if (!this.extraData.equals(DAO_ExtraData)) {
             throw new Error("extraData should be 'dao-hard-fork'")
           }
diff --git a/packages/block/src/types.ts b/packages/block/src/types.ts
index 3f7bada46d..6e6f5b218b 100644
--- a/packages/block/src/types.ts
+++ b/packages/block/src/types.ts
@@ -1,5 +1,6 @@
+import { Address, BN, BNLike, BufferLike } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
-import { TxData } from '@ethereumjs/tx'
+import { TxData, JsonTx } from '@ethereumjs/tx'
 import { Block } from './block'
 
 /**
@@ -36,39 +37,22 @@ export interface BlockOptions {
   initWithGenesisHeader?: boolean
 }
 
-/**
- * Any object that can be transformed into a `Buffer`
- */
-export interface TransformableToBuffer {
-  toBuffer(): Buffer
-}
-
-/**
- * A hex string prefixed with `0x`.
- */
-export type PrefixedHexString = string
-
-/**
- * A Buffer, hex string prefixed with `0x`, Number, or an object with a toBuffer method such as BN.
- */
-export type BufferLike = Buffer | TransformableToBuffer | PrefixedHexString | number
-
 /**
  * A block header's data.
  */
-export interface BlockHeaderData {
+export interface HeaderData {
   parentHash?: BufferLike
   uncleHash?: BufferLike
-  coinbase?: BufferLike
+  coinbase?: AddressLike
   stateRoot?: BufferLike
   transactionsTrie?: BufferLike
   receiptTrie?: BufferLike
   bloom?: BufferLike
-  difficulty?: BufferLike
-  number?: BufferLike
-  gasLimit?: BufferLike
-  gasUsed?: BufferLike
-  timestamp?: BufferLike
+  difficulty?: BNLike
+  number?: BNLike
+  gasLimit?: BNLike
+  gasUsed?: BNLike
+  timestamp?: BNLike
   extraData?: BufferLike
   mixHash?: BufferLike
   nonce?: BufferLike
@@ -78,11 +62,68 @@ export interface BlockHeaderData {
  * A block's data.
  */
 export interface BlockData {
-  header?: Buffer | PrefixedHexString | BufferLike[] | BlockHeaderData
-  transactions?: Array<Buffer | PrefixedHexString | BufferLike[] | TxData>
-  uncleHeaders?: Array<Buffer | PrefixedHexString | BufferLike[] | BlockHeaderData>
+  /**
+   * Header data for the block
+   */
+  header?: HeaderData
+  transactions?: Array<TxData>
+  uncleHeaders?: Array<HeaderData>
+}
+
+export type BlockBuffer = [BlockHeaderBuffer, TransactionsBuffer, UncleHeadersBuffer]
+export type BlockHeaderBuffer = Buffer[]
+export type BlockBodyBuffer = [TransactionsBuffer, UncleHeadersBuffer]
+export type TransactionsBuffer = Buffer[][]
+export type UncleHeadersBuffer = Buffer[][]
+
+/**
+ * An object with the block's data represented as strings.
+ */
+export interface JsonBlock {
+  /**
+   * Header data for the block
+   */
+  header?: JsonHeader
+  transactions?: JsonTx[]
+  uncleHeaders?: JsonHeader[]
+}
+
+/**
+ * An object with the block header's data represented as strings.
+ */
+export interface JsonHeader {
+  parentHash?: string
+  uncleHash?: string
+  coinbase?: string
+  stateRoot?: string
+  transactionsTrie?: string
+  receiptTrie?: string
+  bloom?: string
+  difficulty?: string
+  number?: string
+  gasLimit?: string
+  gasUsed?: string
+  timestamp?: string
+  extraData?: string
+  mixHash?: string
+  nonce?: string
 }
 
 export interface Blockchain {
   getBlock(hash: Buffer): Promise<Block>
 }
+
+/**
+ * A type that represents an Address-like value.
+ * To convert to address, use `new Address(toBuffer(value))
+ * TODO: Move to ethereumjs-util
+ */
+export type AddressLike = Address | Buffer | string
+
+/**
+ * Convert BN to 0x-prefixed hex string.
+ * TODO: Move to ethereumjs-util
+ */
+export function bnToHex(value: BN): string {
+  return `0x${value.toString(16)}`
+}
diff --git a/packages/block/test/block.spec.ts b/packages/block/test/block.spec.ts
index 606cdba06a..5dd6070576 100644
--- a/packages/block/test/block.spec.ts
+++ b/packages/block/test/block.spec.ts
@@ -1,91 +1,94 @@
 import * as tape from 'tape'
-import Common from '@ethereumjs/common'
 import { rlp } from 'ethereumjs-util'
-import { Block } from '../src/block'
+import Common from '@ethereumjs/common'
+import { Block } from '../src'
 
 tape('[Block]: block functions', function (t) {
   t.test('should test block initialization', function (st) {
     const common = new Common({ chain: 'ropsten', hardfork: 'chainstart' })
-    const block1 = new Block(undefined, { common: common, initWithGenesisHeader: true })
-    st.ok(block1.hash().toString('hex'), 'block should initialize')
+    const genesis = Block.genesis({}, { common })
+    st.ok(genesis.hash().toString('hex'), 'block should initialize')
     st.end()
   })
 
   t.test('should initialize with undefined parameters without throwing', function (st) {
     st.doesNotThrow(function () {
-      const block = new Block()
-      st.equal(
-        block._common.hardfork(),
-        'istanbul',
-        'should initialize with the current default HF',
-      )
-      st.end()
+      Block.fromBlockData()
     })
+    st.end()
   })
 
   t.test('should initialize with null parameters without throwing', function (st) {
     st.doesNotThrow(function () {
       const common = new Common({ chain: 'ropsten' })
       const opts = { common }
-      new Block(undefined, opts)
+      Block.fromBlockData({}, opts)
       st.end()
     })
   })
 
   const testData = require('./testdata/testdata.json')
 
-  async function testTransactionValidation(st: tape.Test, block: Block) {
-    st.equal(block.validateTransactions(), true)
-
-    await block.genTxTrie()
+  t.test('should test block validation', async function (st) {
+    const blockRlp = testData.blocks[0].rlp
+    const block = Block.fromRLPSerializedBlock(blockRlp)
+    st.doesNotThrow(async () => {
+      await block.validate()
+      st.end()
+    })
+  })
 
-    st.equal(block.validateTransactionsTrie(), true)
+  async function testTransactionValidation(st: tape.Test, block: Block) {
+    st.ok(block.validateTransactions())
+    st.ok(await block.validateTransactionsTrie())
     st.end()
   }
 
   t.test('should test transaction validation', async function (st) {
-    const block = new Block(rlp.decode(testData.blocks[0].rlp))
+    const blockRlp = testData.blocks[0].rlp
+    const block = Block.fromRLPSerializedBlock(blockRlp)
     st.plan(2)
     await testTransactionValidation(st, block)
   })
 
   t.test('should test transaction validation with empty transaction list', async function (st) {
-    const block = new Block()
+    const block = Block.fromBlockData({})
     st.plan(2)
     await testTransactionValidation(st, block)
   })
 
   const testData2 = require('./testdata/testdata2.json')
   t.test('should test uncles hash validation', function (st) {
-    const block = new Block(rlp.decode(testData2.blocks[2].rlp))
+    const blockRlp = testData2.blocks[2].rlp
+    const block = Block.fromRLPSerializedBlock(blockRlp)
     st.equal(block.validateUnclesHash(), true)
     st.end()
   })
 
   t.test('should test isGenesis (mainnet default)', function (st) {
-    const block = new Block()
+    const block = Block.fromBlockData({ header: { number: 1 } })
     st.notEqual(block.isGenesis(), true)
-    block.header.number = Buffer.from([])
-    st.equal(block.isGenesis(), true)
+    const genesisBlock = Block.fromBlockData({ header: { number: 0 } })
+    st.equal(genesisBlock.isGenesis(), true)
     st.end()
   })
 
   t.test('should test isGenesis (ropsten)', function (st) {
     const common = new Common({ chain: 'ropsten' })
-    const block = new Block(undefined, { common })
+    const block = Block.fromBlockData({ header: { number: 1 } }, { common })
     st.notEqual(block.isGenesis(), true)
-    block.header.number = Buffer.from([])
-    st.equal(block.isGenesis(), true)
+    const genesisBlock = Block.fromBlockData({ header: { number: 0 } }, { common })
+    st.equal(genesisBlock.isGenesis(), true)
     st.end()
   })
 
   const testDataGenesis = require('./testdata/genesishashestest.json').test
   t.test('should test genesis hashes (mainnet default)', function (st) {
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    const rlp = genesisBlock.serialize()
-    st.strictEqual(rlp.toString('hex'), testDataGenesis.genesis_rlp_hex, 'rlp hex match')
+    const genesis = Block.genesis()
+    const genesisRlp = genesis.serialize()
+    st.strictEqual(genesisRlp.toString('hex'), testDataGenesis.genesis_rlp_hex, 'rlp hex match')
     st.strictEqual(
-      genesisBlock.hash().toString('hex'),
+      genesis.hash().toString('hex'),
       testDataGenesis.genesis_hash,
       'genesis hash match',
     )
@@ -94,9 +97,9 @@ tape('[Block]: block functions', function (t) {
 
   t.test('should test genesis hashes (ropsten)', function (st) {
     const common = new Common({ chain: 'ropsten', hardfork: 'chainstart' })
-    const genesisBlock = new Block(undefined, { common: common, initWithGenesisHeader: true })
+    const genesis = Block.genesis({}, { common })
     st.strictEqual(
-      genesisBlock.hash().toString('hex'),
+      genesis.hash().toString('hex'),
       common.genesis().hash.slice(2),
       'genesis hash match',
     )
@@ -105,9 +108,9 @@ tape('[Block]: block functions', function (t) {
 
   t.test('should test genesis hashes (rinkeby)', function (st) {
     const common = new Common({ chain: 'rinkeby', hardfork: 'chainstart' })
-    const genesisBlock = new Block(undefined, { common: common, initWithGenesisHeader: true })
+    const genesis = Block.genesis({}, { common })
     st.strictEqual(
-      genesisBlock.hash().toString('hex'),
+      genesis.hash().toString('hex'),
       common.genesis().hash.slice(2),
       'genesis hash match',
     )
@@ -116,10 +119,10 @@ tape('[Block]: block functions', function (t) {
 
   t.test('should test genesis parameters (ropsten)', function (st) {
     const common = new Common({ chain: 'ropsten', hardfork: 'chainstart' })
-    const genesisBlock = new Block(undefined, { common, initWithGenesisHeader: true })
+    const genesis = Block.genesis({}, { common })
     const ropstenStateRoot = '217b0bbcfb72e2d57e28f33cb361b9983513177755dc3f33ce3e7022ed62b77b'
     st.strictEqual(
-      genesisBlock.header.stateRoot.toString('hex'),
+      genesis.header.stateRoot.toString('hex'),
       ropstenStateRoot,
       'genesis stateRoot match',
     )
@@ -127,9 +130,8 @@ tape('[Block]: block functions', function (t) {
   })
 
   t.test('should test toJSON', function (st) {
-    const block = new Block(rlp.decode(testData2.blocks[2].rlp))
+    const block = Block.fromRLPSerializedBlock(testData2.blocks[2].rlp)
     st.equal(typeof block.toJSON(), 'object')
-    st.equal(typeof block.toJSON(true), 'object')
     st.end()
   })
 
@@ -141,7 +143,7 @@ tape('[Block]: block functions', function (t) {
     const common = new Common({ chain: 'mainnet', hardfork: 'dao' })
     st.throws(
       function () {
-        new Block(blockData, { common: common })
+        Block.fromValuesArray(blockData, { common })
       },
       /Error: extraData should be 'dao-hard-fork'$/,
       'should throw on DAO HF block with wrong extra data',
@@ -149,8 +151,9 @@ tape('[Block]: block functions', function (t) {
 
     // Set extraData to dao-hard-fork
     blockData[0][12] = Buffer.from('64616f2d686172642d666f726b', 'hex')
+
     st.doesNotThrow(function () {
-      new Block(blockData, { common: common })
+      Block.fromValuesArray(blockData, { common })
     }, 'should not throw on DAO HF block with correct extra data')
     st.end()
   })
diff --git a/packages/block/test/difficulty.spec.ts b/packages/block/test/difficulty.spec.ts
index 78c5f4a47a..3bc4dc2f02 100644
--- a/packages/block/test/difficulty.spec.ts
+++ b/packages/block/test/difficulty.spec.ts
@@ -1,9 +1,7 @@
 import * as tape from 'tape'
-import { toBuffer, bufferToInt, intToBuffer } from 'ethereumjs-util'
-import { Block } from '../src/block'
+import { BN, toBuffer, bufferToInt } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
-
-const { BN } = require('ethereumjs-util')
+import { Block } from '../src'
 
 function isHexPrefixed(str: string) {
   return str.toLowerCase().startsWith('0x')
@@ -42,15 +40,27 @@ tape('[Header]: difficulty tests', (t) => {
     for (const testName in testData) {
       const test = testData[testName]
       const common = new Common({ chain: 'mainnet', hardfork: hardfork })
-      const parentBlock = new Block(undefined, { common })
-      parentBlock.header.timestamp = test.parentTimestamp
-      parentBlock.header.difficulty = test.parentDifficulty
-      parentBlock.header.uncleHash = test.parentUncles
+      const parentBlock = Block.fromBlockData(
+        {
+          header: {
+            timestamp: test.parentTimestamp,
+            difficulty: test.parentDifficulty,
+            uncleHash: test.parentUncles,
+          },
+        },
+        { common },
+      )
 
-      const block = new Block(undefined, { common })
-      block.header.timestamp = test.currentTimestamp
-      block.header.difficulty = test.currentDifficulty
-      block.header.number = test.currentBlockNumber
+      const block = Block.fromBlockData(
+        {
+          header: {
+            timestamp: test.currentTimestamp,
+            difficulty: test.currentDifficulty,
+            number: test.currentBlockNumber,
+          },
+        },
+        { common },
+      )
 
       runDifficultyTests(
         test,
@@ -74,11 +84,11 @@ tape('[Header]: difficulty tests', (t) => {
         header: {
           timestamp: test.parentTimestamp,
           difficulty: test.parentDifficulty,
-          number: intToBuffer(bufferToInt(test.currentBlockNumber) - 1),
+          number: bufferToInt(test.currentBlockNumber) - 1,
           uncleHash: test.parentUncles,
         },
       }
-      const parentBlock = new Block(parentData, { common, hardforkByBlockNumber: true })
+      const parentBlock = Block.fromBlockData(parentData, { common, hardforkByBlockNumber: true })
 
       const blockData = {
         header: {
@@ -87,7 +97,7 @@ tape('[Header]: difficulty tests', (t) => {
           number: test.currentBlockNumber,
         },
       }
-      const block = new Block(blockData, { common, hardforkByBlockNumber: true })
+      const block = Block.fromBlockData(blockData, { common, hardforkByBlockNumber: true })
 
       runDifficultyTests(
         test,
diff --git a/packages/block/test/header.spec.ts b/packages/block/test/header.spec.ts
index f656816ef0..1951066d1a 100644
--- a/packages/block/test/header.spec.ts
+++ b/packages/block/test/header.spec.ts
@@ -1,53 +1,54 @@
 import * as tape from 'tape'
+import { Address, BN, zeros, KECCAK256_RLP, KECCAK256_RLP_ARRAY } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
-import { rlp, toBuffer, zeros, KECCAK256_RLP, KECCAK256_RLP_ARRAY } from 'ethereumjs-util'
 import { BlockHeader } from '../src/header'
-import { Block } from '../src/block'
+import { Block } from '../src'
 
 tape('[Block]: Header functions', function (t) {
   t.test('should create with default constructor', function (st) {
     function compareDefaultHeader(st: tape.Test, header: BlockHeader) {
-      st.deepEqual(header.parentHash, zeros(32))
+      st.ok(header.parentHash.equals(zeros(32)))
       st.ok(header.uncleHash.equals(KECCAK256_RLP_ARRAY))
-      st.deepEqual(header.coinbase, zeros(20))
-      st.deepEqual(header.stateRoot, zeros(32))
+      st.ok(header.coinbase.buf.equals(Address.zero().buf))
+      st.ok(header.stateRoot.equals(zeros(32)))
       st.ok(header.transactionsTrie.equals(KECCAK256_RLP))
       st.ok(header.receiptTrie.equals(KECCAK256_RLP))
-      st.deepEqual(header.bloom, zeros(256))
-      st.deepEqual(header.difficulty, Buffer.from([]))
-      st.deepEqual(header.number, toBuffer(1150000))
-      st.deepEqual(header.gasLimit, Buffer.from('ffffffffffffff', 'hex'))
-      st.deepEqual(header.gasUsed, Buffer.from([]))
-      st.deepEqual(header.timestamp, Buffer.from([]))
-      st.deepEqual(header.extraData, Buffer.from([]))
-      st.deepEqual(header.mixHash, zeros(32))
-      st.deepEqual(header.nonce, zeros(8))
+      st.ok(header.bloom.equals(zeros(256)))
+      st.ok(header.difficulty.isZero())
+      st.ok(header.number.isZero())
+      st.ok(header.gasLimit.eq(new BN(Buffer.from('ffffffffffffff', 'hex'))))
+      st.ok(header.gasUsed.isZero())
+      st.ok(header.timestamp.isZero())
+      st.ok(header.extraData.equals(Buffer.from([])))
+      st.ok(header.mixHash.equals(zeros(32)))
+      st.ok(header.nonce.equals(zeros(8)))
     }
 
-    let header = new BlockHeader()
+    const header = BlockHeader.fromHeaderData()
     compareDefaultHeader(st, header)
 
     const block = new Block()
-    header = block.header
-    compareDefaultHeader(st, header)
+    compareDefaultHeader(st, block.header)
 
     st.end()
   })
 
   t.test('should test header initialization', function (st) {
     const common = new Common({ chain: 'ropsten', hardfork: 'chainstart' })
-    const block1 = new Block(undefined, { common: common, initWithGenesisHeader: true })
-    st.ok(block1.hash().toString('hex'), 'block should initialize')
+    const header = BlockHeader.genesis(undefined, { common })
+    st.ok(header.hash().toString('hex'), 'block should initialize')
     st.end()
   })
 
   t.test('should test validateGasLimit', function (st) {
     const testData = require('./testdata/bcBlockGasLimitTest.json').tests
-    const bcBlockGasLimigTestData = testData.BlockGasLimit2p63m1
+    const bcBlockGasLimitTestData = testData.BlockGasLimit2p63m1
 
-    Object.keys(bcBlockGasLimigTestData).forEach((key) => {
-      const parentBlock = new Block(rlp.decode(bcBlockGasLimigTestData[key].genesisRLP))
-      const block = new Block(rlp.decode(bcBlockGasLimigTestData[key].blocks[0].rlp))
+    Object.keys(bcBlockGasLimitTestData).forEach((key) => {
+      const genesisRlp = bcBlockGasLimitTestData[key].genesisRLP
+      const parentBlock = Block.fromRLPSerializedBlock(genesisRlp)
+      const blockRlp = bcBlockGasLimitTestData[key].blocks[0].rlp
+      const block = Block.fromRLPSerializedBlock(blockRlp)
       st.equal(block.header.validateGasLimit(parentBlock), true)
     })
 
@@ -55,16 +56,17 @@ tape('[Block]: Header functions', function (t) {
   })
 
   t.test('should test isGenesis', function (st) {
-    const header = new BlockHeader()
-    st.equal(header.isGenesis(), false)
-    header.number = Buffer.from([])
-    st.equal(header.isGenesis(), true)
+    const header1 = BlockHeader.fromHeaderData({ number: 1 })
+    st.equal(header1.isGenesis(), false)
+
+    const header2 = BlockHeader.genesis()
+    st.equal(header2.isGenesis(), true)
     st.end()
   })
 
-  const testDataGenesis = require('./testdata/genesishashestest.json').test
   t.test('should test genesis hashes (mainnet default)', function (st) {
-    const header = new BlockHeader(undefined, { initWithGenesisHeader: true })
+    const testDataGenesis = require('./testdata/genesishashestest.json').test
+    const header = BlockHeader.genesis()
     st.strictEqual(
       header.hash().toString('hex'),
       testDataGenesis.genesis_hash,
@@ -75,13 +77,9 @@ tape('[Block]: Header functions', function (t) {
 
   t.test('should test genesis parameters (ropsten)', function (st) {
     const common = new Common({ chain: 'ropsten', hardfork: 'chainstart' })
-    const genesisHeader = new BlockHeader(undefined, { common, initWithGenesisHeader: true })
+    const genesis = BlockHeader.genesis({}, { common })
     const ropstenStateRoot = '217b0bbcfb72e2d57e28f33cb361b9983513177755dc3f33ce3e7022ed62b77b'
-    st.strictEqual(
-      genesisHeader.stateRoot.toString('hex'),
-      ropstenStateRoot,
-      'genesis stateRoot match',
-    )
+    st.strictEqual(genesis.stateRoot.toString('hex'), ropstenStateRoot, 'genesis stateRoot match')
     st.end()
   })
 })
diff --git a/packages/blockchain/README.md b/packages/blockchain/README.md
index 5d4f1c73f6..8d65eb82b2 100644
--- a/packages/blockchain/README.md
+++ b/packages/blockchain/README.md
@@ -24,7 +24,6 @@ This module performs write operations. Making a backup of your data before tryin
 
 ```typescript
 import Blockchain from '@ethereumjs/blockchain'
-import { bufferToInt } from 'ethereumjs-util'
 
 const level = require('level')
 
@@ -34,7 +33,7 @@ const db = level(gethDbPath)
 const blockchain = new Blockchain({ db })
 
 blockchain.iterator('i', (block) => {
-  const blockNumber = bufferToInt(block.header.number)
+  const blockNumber = block.header.number.toString()
   const blockHash = block.hash().toString('hex')
   console.log(`Block ${blockNumber}: ${blockHash}`)
 })
diff --git a/packages/blockchain/package.json b/packages/blockchain/package.json
index ac9144ef81..d85b40a838 100644
--- a/packages/blockchain/package.json
+++ b/packages/blockchain/package.json
@@ -39,7 +39,7 @@
     "@ethereumjs/block": "^3.0.0",
     "@ethereumjs/common": "^1.5.1",
     "@ethereumjs/ethash": "^1.0.0",
-    "ethereumjs-util": "^7.0.5",
+    "ethereumjs-util": "^7.0.6",
     "level-mem": "^5.0.1",
     "lru-cache": "^5.1.1",
     "rlp": "^2.2.3",
diff --git a/packages/blockchain/src/dbManager.ts b/packages/blockchain/src/dbManager.ts
index 48841c1087..9a2fc653e6 100644
--- a/packages/blockchain/src/dbManager.ts
+++ b/packages/blockchain/src/dbManager.ts
@@ -1,5 +1,12 @@
 import * as rlp from 'rlp'
-import { Block, BlockHeader } from '@ethereumjs/block'
+import { BN } from 'ethereumjs-util'
+import {
+  Block,
+  BlockHeader,
+  BlockBuffer,
+  BlockHeaderBuffer,
+  BlockBodyBuffer,
+} from '@ethereumjs/block'
 import Common from '@ethereumjs/common'
 import Cache from './cache'
 import {
@@ -13,7 +20,6 @@ import {
   headerKey,
 } from './util'
 
-import BN = require('bn.js')
 import type { LevelUp } from 'levelup'
 
 const level = require('level-mem')
@@ -90,7 +96,6 @@ export class DBManager {
    * which can be either its hash or its number.
    */
   async getBlock(blockId: Buffer | BN | number): Promise<Block> {
-    // determine blockId type
     if (typeof blockId === 'number' && Number.isInteger(blockId)) {
       blockId = new BN(blockId)
     }
@@ -107,39 +112,37 @@ export class DBManager {
       throw new Error('Unknown blockId type')
     }
 
-    const header = (await this.getHeader(hash, number)).raw
-    let body: any
+    const header: BlockHeaderBuffer = (await this.getHeader(hash, number)).raw()
+    let body: BlockBodyBuffer = [[], []]
     try {
       body = await this.getBody(hash, number)
     } catch (error) {
       if (error.type !== 'NotFoundError') {
         throw error
       }
-      body = [[], []]
     }
-
-    const blockData = [header].concat(body) as [Buffer[], Buffer[], Buffer[]]
-    return new Block(blockData, { common: this._common })
+    const blockData = [header, ...body] as BlockBuffer
+    const opts = { common: this._common }
+    return Block.fromValuesArray(blockData, opts)
   }
 
   /**
    * Fetches body of a block given its hash and number.
    */
-  async getBody(hash: Buffer, number: BN): Promise<Buffer> {
+  async getBody(hash: Buffer, number: BN): Promise<BlockBodyBuffer> {
     const key = bodyKey(number, hash)
-    return rlp.decode(await this.get(key, { cache: 'body' }))
+    const body = await this.get(key, { cache: 'body' })
+    return (rlp.decode(body) as any) as BlockBodyBuffer
   }
 
   /**
    * Fetches header of a block given its hash and number.
    */
-
   async getHeader(hash: Buffer, number: BN) {
     const key = headerKey(number, hash)
     const encodedHeader = await this.get(key, { cache: 'header' })
-    return new BlockHeader(rlp.decode(encodedHeader), {
-      common: this._common,
-    })
+    const opts = { common: this._common }
+    return BlockHeader.fromRLPSerializedHeader(encodedHeader, opts)
   }
 
   /**
@@ -156,7 +159,8 @@ export class DBManager {
    */
   async hashToNumber(hash: Buffer): Promise<BN> {
     const key = hashToNumberKey(hash)
-    return new BN(await this.get(key, { cache: 'hashToNumber' }))
+    const value = await this.get(key, { cache: 'hashToNumber' })
+    return new BN(value)
   }
 
   /**
diff --git a/packages/blockchain/src/index.ts b/packages/blockchain/src/index.ts
index ddbe00faea..b884fc3e90 100644
--- a/packages/blockchain/src/index.ts
+++ b/packages/blockchain/src/index.ts
@@ -216,8 +216,8 @@ export default class Blockchain implements BlockchainInterface {
    */
   async _setCanonicalGenesisBlock() {
     const common = new Common({ chain: this._common.chainId(), hardfork: 'chainstart' })
-    const genesisBlock = new Block(undefined, { common, initWithGenesisHeader: true })
-    await this._putBlockOrHeader(genesisBlock, true)
+    const genesis = Block.genesis({}, { common })
+    await this._putBlockOrHeader(genesis, true)
   }
 
   /**
@@ -301,14 +301,14 @@ export default class Blockchain implements BlockchainInterface {
     }
 
     await this._lock.wait()
-    await this._putBlockOrHeader(block, isGenesis)
-      .then(() => {
-        this._lock.release()
-      })
-      .catch((reason) => {
-        this._lock.release()
-        throw reason
-      })
+
+    try {
+      await this._putBlockOrHeader(block, isGenesis)
+      this._lock.release()
+    } catch (error) {
+      this._lock.release()
+      throw error
+    }
   }
 
   /**
@@ -333,36 +333,29 @@ export default class Blockchain implements BlockchainInterface {
     }
 
     await this._lock.wait()
-    await this._putBlockOrHeader(header)
-      .then(() => {
-        this._lock.release()
-      })
-      .catch((reason) => {
-        this._lock.release()
-        throw reason
-      })
+    try {
+      await this._putBlockOrHeader(header)
+      this._lock.release()
+    } catch (error) {
+      this._lock.release()
+      throw error
+    }
   }
 
   /**
    * @hidden
    */
   async _putBlockOrHeader(item: Block | BlockHeader, isGenesis?: boolean) {
-    let block =
-      item instanceof BlockHeader
-        ? new Block([item.raw, [], []], { common: (item as any)._common })
-        : item
-    const header = block.header
+    const block = item instanceof BlockHeader ? new Block(item) : item
+
     const hash = block.hash()
-    const number = new BN(header.number)
-    const td = new BN(header.difficulty)
-    const currentTd: { [key: string]: BN } = { header: new BN(0), block: new BN(0) }
+    const { header } = block
+    const { number } = header
+    const td = header.difficulty.clone()
+    const currentTd = { header: new BN(0), block: new BN(0) }
     const dbOps: DBOp[] = []
 
-    if (block.constructor !== Block) {
-      block = new Block(block, { common: this._common })
-    }
-
-    if ((block as any)._common.chainId() !== this._common.chainId()) {
+    if (block._common.chainId() !== this._common.chainId()) {
       throw new Error('Chain mismatch while trying to put block or header')
     }
 
@@ -404,15 +397,14 @@ export default class Blockchain implements BlockchainInterface {
 
       // save header
       key = headerKey(number, hash)
-      value = rlp.encode(header.raw)
+      value = header.serialize()
       dbOps.push({ type, key, value, keyEncoding, valueEncoding })
       this.dbManager._cache.header.set(key, value)
 
       // store body if it exists
       if (isGenesis || block.transactions.length || block.uncleHeaders.length) {
-        const body = block.serialize(false).slice(1)
         key = bodyKey(number, hash)
-        value = rlp.encode(body)
+        value = rlp.encode(block.raw().slice(1))
         dbOps.push({ type, key, value, keyEncoding, valueEncoding })
         this.dbManager._cache.body.set(key, value)
       }
@@ -428,7 +420,7 @@ export default class Blockchain implements BlockchainInterface {
         }
 
         // delete higher number assignments and overwrite stale canonical chain
-        await this._deleteStaleAssignments(number.iaddn(1), hash, dbOps)
+        await this._deleteStaleAssignments(number.addn(1), hash, dbOps)
         await this._rebuildCanonical(header, dbOps)
       } else {
         if (td.gt(currentTd.block) && item instanceof Block) {
@@ -437,7 +429,7 @@ export default class Blockchain implements BlockchainInterface {
         // save hash to number lookup info even if rebuild not needed
         key = hashToNumberKey(hash)
         value = bufBE8(number)
-        dbOps.push({ type: 'put', key, keyEncoding, valueEncoding, value })
+        dbOps.push({ type, key, keyEncoding, valueEncoding, value })
         this.dbManager._cache.hashToNumber.set(key, value)
       }
     }
@@ -594,14 +586,11 @@ export default class Blockchain implements BlockchainInterface {
       return
     }
 
+    const type = 'del'
     const key = numberToHashKey(number)
+    const keyEncoding = 'binary'
 
-    ops.push({
-      type: 'del',
-      key,
-      keyEncoding: 'binary',
-    })
-
+    ops.push({ type, key, keyEncoding })
     this.dbManager._cache.numberToHash.del(key)
 
     // reset stale iterator heads to current canonical head
@@ -626,34 +615,26 @@ export default class Blockchain implements BlockchainInterface {
    */
   async _rebuildCanonical(header: BlockHeader, ops: DBOp[]) {
     const hash = header.hash()
-    const number = new BN(header.number)
+    const { number } = header
 
     const saveLookups = async (hash: Buffer, number: BN) => {
+      const type = 'put'
+      const keyEncoding = 'binary'
+      const valueEncoding = 'binary'
+
       let key = numberToHashKey(number)
-      let value
-      ops.push({
-        type: 'put',
-        key: key,
-        keyEncoding: 'binary',
-        valueEncoding: 'binary',
-        value: hash,
-      })
-      this.dbManager._cache.numberToHash.set(key, hash)
+      let value = hash
+      ops.push({ type, key, keyEncoding, valueEncoding, value })
+      this.dbManager._cache.numberToHash.set(key, value)
 
       key = hashToNumberKey(hash)
       value = bufBE8(number)
-      ops.push({
-        type: 'put',
-        key: key,
-        keyEncoding: 'binary',
-        valueEncoding: 'binary',
-        value: value,
-      })
+      ops.push({ type, key, keyEncoding, valueEncoding, value })
       this.dbManager._cache.hashToNumber.set(key, value)
     }
 
     // handle genesis block
-    if (number.cmpn(0) === 0) {
+    if (number.isZero()) {
       await saveLookups(hash, number)
       return
     }
@@ -717,14 +698,13 @@ export default class Blockchain implements BlockchainInterface {
     }
 
     await this._lock.wait()
-    await this._delBlock(blockHash)
-      .then(() => {
-        this._lock.release()
-      })
-      .catch((reason) => {
-        this._lock.release()
-        throw reason
-      })
+    try {
+      await this._delBlock(blockHash)
+      this._lock.release()
+    } catch (error) {
+      this._lock.release()
+      throw error
+    }
   }
 
   /**
diff --git a/packages/blockchain/test/index.ts b/packages/blockchain/test/index.ts
index 0532ecb897..261c2d6596 100644
--- a/packages/blockchain/test/index.ts
+++ b/packages/blockchain/test/index.ts
@@ -1,7 +1,7 @@
+import * as test from 'tape'
+import { BN } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
 import { Block, BlockHeader } from '@ethereumjs/block'
-import { BN, toBuffer, bufferToInt } from 'ethereumjs-util'
-import * as test from 'tape'
 import Blockchain from '../src'
 import { generateBlockchain, generateBlocks, isConsecutive, createTestDB } from './util'
 import * as testData from './testdata.json'
@@ -27,20 +27,15 @@ test('blockchain test', (t) => {
 
   t.test('should add a genesis block without errors', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    await blockchain.putGenesis(genesisBlock)
-    st.ok(
-      genesisBlock.hash().equals(blockchain.meta.genesis!),
-      'genesis block hash should be correct',
-    )
+    const genesis = Block.genesis()
+    await blockchain.putGenesis(genesis)
+    st.ok(genesis.hash().equals(blockchain.meta.genesis!), 'genesis block hash should be correct')
     st.end()
   })
 
   t.test('should not validate a block incorrectly flagged as genesis', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
-    const badBlock = new Block()
-    badBlock.header.number = Buffer.from([])
-
+    const badBlock = Block.fromBlockData({ header: { number: new BN(8) } })
     try {
       await blockchain.putBlock(badBlock, false)
     } catch (error) {
@@ -59,21 +54,29 @@ test('blockchain test', (t) => {
   t.test('should add 10 blocks, one at a time', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
     const blocks: Block[] = []
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    blocks.push(genesisBlock)
-
-    const addNextBlock = async (blockNumber: number) => {
-      const block = new Block()
-      block.header.number = toBuffer(blockNumber)
-      block.header.parentHash = blocks[blockNumber - 1].hash()
-      block.header.difficulty = toBuffer(block.header.canonicalDifficulty(blocks[blockNumber - 1]))
-      block.header.gasLimit = toBuffer(8000000)
-      block.header.timestamp = toBuffer(bufferToInt(blocks[blockNumber - 1].header.timestamp) + 1)
+    const gasLimit = 8000000
+
+    const genesis = Block.genesis({ header: { gasLimit } })
+    blocks.push(genesis)
+    await blockchain.putGenesis(genesis)
+
+    const addNextBlock = async (number: number) => {
+      const lastBlock = blocks[number - 1]
+      const blockData = {
+        header: {
+          number,
+          parentHash: lastBlock.hash(),
+          difficulty: lastBlock.header.canonicalDifficulty(lastBlock),
+          timestamp: lastBlock.header.timestamp.addn(1),
+          gasLimit,
+        },
+      }
+      const block = Block.fromBlockData(blockData)
       await blockchain.putBlock(block)
       blocks.push(block)
+
       if (blocks.length < 10) {
-        addNextBlock(blockNumber + 1)
+        addNextBlock(number + 1)
       } else {
         const getBlocks = await blockchain.getBlocks(blocks[0].hash(), 10, 0, false)
         st.equal(getBlocks.length, 10)
@@ -81,46 +84,54 @@ test('blockchain test', (t) => {
       }
     }
 
-    await blockchain.putGenesis(genesisBlock)
     await addNextBlock(1)
   })
 
   t.test('should get block by number', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
     const blocks: Block[] = []
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    blocks.push(genesisBlock)
-    const block = new Block()
-    block.header.number = toBuffer(1)
-    block.header.parentHash = blocks[0].hash()
-    block.header.difficulty = toBuffer(block.header.canonicalDifficulty(blocks[0]))
-    block.header.gasLimit = toBuffer(8000000)
-    block.header.timestamp = toBuffer(bufferToInt(blocks[0].header.timestamp) + 1)
+    const gasLimit = 8000000
+
+    const genesis = Block.genesis({ header: { gasLimit } })
+    blocks.push(genesis)
+    await blockchain.putGenesis(genesis)
+
+    const blockData = {
+      header: {
+        number: 1,
+        parentHash: genesis.hash(),
+        difficulty: genesis.header.canonicalDifficulty(genesis),
+        timestamp: genesis.header.timestamp.addn(1),
+        gasLimit,
+      },
+    }
+    const block = Block.fromBlockData(blockData)
     blocks.push(block)
-    await blockchain.putGenesis(genesisBlock)
     await blockchain.putBlock(block)
+
     const returnedBlock = await blockchain.getBlock(1)
     if (returnedBlock) {
       st.ok(returnedBlock.hash().equals(blocks[1].hash()))
-      st.end()
     } else {
       st.fail('block is not defined!')
     }
+    st.end()
   })
 
   t.test('should get block by hash', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    await blockchain.putGenesis(genesisBlock)
-    const block = await blockchain.getBlock(genesisBlock.hash())
+    const gasLimit = 8000000
+
+    const genesis = Block.genesis({ header: { gasLimit } })
+    await blockchain.putGenesis(genesis)
+
+    const block = await blockchain.getBlock(genesis.hash())
     if (block) {
-      st.ok(block.hash().equals(genesisBlock.hash()))
-      st.end()
+      st.ok(block.hash().equals(genesis.hash()))
     } else {
       st.fail('block is not defined!')
     }
+    st.end()
   })
 
   t.test('should get 5 consecutive blocks, starting from genesis hash', async (st) => {
@@ -129,7 +140,7 @@ test('blockchain test', (t) => {
     // start: genesisHash, max: 5, skip: 0, reverse: false
     const getBlocks = await blockchain.getBlocks(blocks[0].hash(), 5, 0, false)
     st.equal(getBlocks!.length, 5)
-    st.ok(getBlocks![0].header.number.equals(getBlocks[0].header.number))
+    st.ok(blocks[0].header.number.eq(getBlocks[0].header.number))
     st.ok(isConsecutive(getBlocks!), 'blocks should be consecutive')
     st.end()
   })
@@ -140,7 +151,7 @@ test('blockchain test', (t) => {
     // start: genesisHash, max: 5, skip: 1, reverse: false
     const getBlocks = await blockchain.getBlocks(blocks[0].hash(), 5, 1, false)
     st.equal(getBlocks!.length, 5, 'should get 5 blocks')
-    st.ok(getBlocks![1].header.number.equals(blocks[2].header.number), 'should skip second block')
+    st.ok(getBlocks![1].header.number.eq(blocks[2].header.number), 'should skip second block')
     st.ok(!isConsecutive(getBlocks!), 'blocks should not be consecutive')
     st.end()
   })
@@ -151,10 +162,7 @@ test('blockchain test', (t) => {
     // start: genesisHash, max: 4, skip: 2, reverse: false
     const getBlocks = await blockchain.getBlocks(blocks[0].hash(), 4, 2, false)
     st.equal(getBlocks!.length, 4, 'should get 4 blocks')
-    st.ok(
-      getBlocks![1].header.number.equals(blocks[3].header.number),
-      'should skip two blocks apart',
-    )
+    st.ok(getBlocks![1].header.number.eq(blocks[3].header.number), 'should skip two blocks apart')
     st.ok(!isConsecutive(getBlocks!), 'blocks should not be consecutive')
     st.end()
   })
@@ -165,7 +173,7 @@ test('blockchain test', (t) => {
     // start: genesisHash, max: 17, skip: 0, reverse: false
     const getBlocks = await blockchain.getBlocks(blocks[0].hash(), 17, 0, false)
     st.equal(getBlocks!.length, 15)
-    st.ok(getBlocks![0].header.number.equals(blocks[0].header.number))
+    st.ok(getBlocks![0].header.number.eq(blocks[0].header.number))
     st.ok(isConsecutive(getBlocks!), 'blocks should be consecutive')
     st.end()
   })
@@ -176,7 +184,7 @@ test('blockchain test', (t) => {
     // start: 0, max: 5, skip: 0, reverse: false
     const getBlocks = await blockchain.getBlocks(0, 5, 0, false)
     st.equal(getBlocks!.length, 5)
-    st.ok(getBlocks![0].header.number.equals(blocks[0].header.number))
+    st.ok(getBlocks![0].header.number.eq(blocks[0].header.number))
     st.ok(isConsecutive(getBlocks!), 'blocks should be consecutive')
     st.end()
   })
@@ -187,7 +195,7 @@ test('blockchain test', (t) => {
     // start: 1, max: 5, skip: 1, reverse: false
     const getBlocks = await blockchain.getBlocks(1, 5, 1, false)
     st.equal(getBlocks!.length, 5)
-    st.ok(getBlocks![1].header.number.equals(blocks[3].header.number), 'should skip one block')
+    st.ok(getBlocks![1].header.number.eq(blocks[3].header.number), 'should skip one block')
     st.ok(!isConsecutive(getBlocks!), 'blocks should not be consecutive')
     st.end()
   })
@@ -198,7 +206,7 @@ test('blockchain test', (t) => {
     // start: 0, max: 5, skip: 2, reverse: false
     const getBlocks = await blockchain.getBlocks(0, 5, 2, false)
     st.equal(getBlocks!.length, 5)
-    st.ok(getBlocks![1].header.number.equals(blocks[3].header.number), 'should skip two blocks')
+    st.ok(getBlocks![1].header.number.eq(blocks[3].header.number), 'should skip two blocks')
     st.ok(!isConsecutive(getBlocks!), 'blocks should not be consecutive')
     st.end()
   })
@@ -209,7 +217,7 @@ test('blockchain test', (t) => {
     // start: 0, max: 17, skip: 0, reverse: false
     const getBlocks = await blockchain.getBlocks(0, 17, 0, false)
     st.equal(getBlocks!.length, 15)
-    st.ok(getBlocks![0].header.number.equals(blocks[0].header.number))
+    st.ok(getBlocks![0].header.number.eq(blocks[0].header.number))
     st.ok(isConsecutive(getBlocks!), 'blocks should be consecutive')
     st.end()
   })
@@ -220,7 +228,7 @@ test('blockchain test', (t) => {
     // start: 1, max: 5, skip: 0, reverse: false
     const getBlocks = await blockchain.getBlocks(1, 5, 0, false)
     st.equal(getBlocks!.length, 5)
-    st.ok(getBlocks![0].header.number.equals(blocks[1].header.number))
+    st.ok(getBlocks![0].header.number.eq(blocks[1].header.number))
     st.ok(isConsecutive(getBlocks!), 'blocks should be consecutive')
     st.end()
   })
@@ -231,7 +239,7 @@ test('blockchain test', (t) => {
     // start: 5, max: 5, skip: 0, reverse: false
     const getBlocks = await blockchain.getBlocks(5, 5, 0, false)
     st.equal(getBlocks!.length, 5)
-    st.ok(getBlocks![0].header.number.equals(blocks[5].header.number))
+    st.ok(getBlocks![0].header.number.eq(blocks[5].header.number))
     st.ok(isConsecutive(getBlocks!), 'blocks should be consecutive')
     st.end()
   })
@@ -242,7 +250,7 @@ test('blockchain test', (t) => {
     // start: 5, max: 5, skip: 0, reverse: true
     const getBlocks = await blockchain.getBlocks(5, 5, 0, true)
     st.equal(getBlocks!.length, 5)
-    st.ok(getBlocks![0].header.number.equals(blocks[5].header.number))
+    st.ok(getBlocks![0].header.number.eq(blocks[5].header.number))
     st.ok(isConsecutive(getBlocks!.reverse()), 'blocks should be consecutive')
     st.end()
   })
@@ -253,7 +261,7 @@ test('blockchain test', (t) => {
     // start: 5, max: 15, skip: 0, reverse: true
     const getBlocks = await blockchain.getBlocks(5, 15, 0, true)
     st.equal(getBlocks!.length, 6)
-    st.ok(getBlocks![0].header.number.equals(blocks[5].header.number))
+    st.ok(getBlocks![0].header.number.eq(blocks[5].header.number))
     st.ok(isConsecutive(getBlocks!.reverse()), 'blocks should be consecutive')
     st.end()
   })
@@ -264,7 +272,7 @@ test('blockchain test', (t) => {
     // start: 10, max: 10, skip: 1, reverse: true
     const getBlocks = await blockchain.getBlocks(10, 10, 1, true)
     st.equal(getBlocks!.length, 6)
-    st.ok(getBlocks![1].header.number.equals(blocks[8].header.number), 'should skip one block')
+    st.ok(getBlocks![1].header.number.eq(blocks[8].header.number), 'should skip one block')
     st.ok(!isConsecutive(getBlocks!.reverse()), 'blocks should not be consecutive')
     st.end()
   })
@@ -338,16 +346,23 @@ test('blockchain test', (t) => {
   t.test('should add fork header and reset stale heads', async (st) => {
     const { blockchain, blocks, error } = await generateBlockchain(15)
     st.error(error, 'no error')
+
     await blockchain.putBlocks(blocks.slice(1))
+
     const common = new Common({ chain: 'mainnet', hardfork: 'chainstart' })
-    const forkHeader = new BlockHeader(undefined, { common })
-    forkHeader.number = toBuffer(15)
-    forkHeader.parentHash = blocks[14].hash()
-    forkHeader.difficulty = toBuffer(forkHeader.canonicalDifficulty(blocks[14]))
-    forkHeader.gasLimit = toBuffer(8000000)
-    forkHeader.timestamp = toBuffer(bufferToInt(blocks[14].header.timestamp) + 1)
+    const headerData = {
+      number: 15,
+      parentHash: blocks[14].hash(),
+      difficulty: blocks[14].header.canonicalDifficulty(blocks[14]),
+      gasLimit: 8000000,
+      timestamp: blocks[14].header.timestamp.addn(1),
+    }
+    const forkHeader = BlockHeader.fromHeaderData(headerData, { common })
+
     blockchain._heads['staletest'] = blockchain._headHeader
+
     await blockchain.putHeader(forkHeader)
+
     st.ok(blockchain._heads['staletest'].equals(blocks[14].hash()), 'should update stale head')
     st.ok(blockchain._headBlock.equals(blocks[14].hash()), 'should update stale headBlock')
     st.end()
@@ -356,19 +371,26 @@ test('blockchain test', (t) => {
   t.test('should delete fork header', async (st) => {
     const { blockchain, blocks, error } = await generateBlockchain(15)
     st.error(error, 'no error')
+
     const common = new Common({ chain: 'mainnet', hardfork: 'chainstart' })
-    const forkHeader = new BlockHeader(undefined, { common })
-    forkHeader.number = toBuffer(15)
-    forkHeader.parentHash = blocks[14].hash()
-    forkHeader.difficulty = toBuffer(forkHeader.canonicalDifficulty(blocks[14]))
-    forkHeader.gasLimit = toBuffer(8000000)
-    forkHeader.timestamp = toBuffer(bufferToInt(blocks[14].header.timestamp) + 1)
+    const headerData = {
+      number: 15,
+      parentHash: blocks[14].hash(),
+      difficulty: blocks[14].header.canonicalDifficulty(blocks[14]),
+      gasLimit: 8000000,
+      timestamp: blocks[14].header.timestamp.addn(1),
+    }
+    const forkHeader = BlockHeader.fromHeaderData(headerData, { common })
+
     blockchain._heads['staletest'] = blockchain._headHeader
+
     await blockchain.putHeader(forkHeader)
+
     st.ok(blockchain._heads['staletest'].equals(blocks[14].hash()), 'should update stale head')
     st.ok(blockchain._headBlock.equals(blocks[14].hash()), 'should update stale headBlock')
 
     await blockchain.delBlock(forkHeader.hash())
+
     st.ok(blockchain._headHeader.equals(blocks[14].hash()), 'should reset headHeader')
     st.ok(blockchain._headBlock.equals(blocks[14].hash()), 'should not change headBlock')
     st.end()
@@ -412,10 +434,9 @@ test('blockchain test', (t) => {
   t.test('should put multiple blocks at once', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
     const blocks: Block[] = []
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    blocks.push(...generateBlocks(15, [genesisBlock]))
-    await blockchain.putGenesis(genesisBlock)
+    const genesis = Block.genesis({ header: { gasLimit: 8000000 } })
+    blocks.push(...generateBlocks(15, [genesis]))
+    await blockchain.putGenesis(genesis)
     await blockchain.putBlocks(blocks.slice(1))
     st.end()
   })
@@ -439,23 +460,28 @@ test('blockchain test', (t) => {
 
   t.test('should validate', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    await blockchain.putGenesis(genesisBlock)
-    const invalidBlock = new Block()
+    const genesis = Block.genesis({ header: { gasLimit: 8000000 } })
+    await blockchain.putGenesis(genesis)
+
+    const invalidBlock = Block.fromBlockData({ header: { number: 50 } })
     try {
       await blockchain.putBlock(invalidBlock)
+      st.fail('should not validate an invalid block')
     } catch (error) {
       t.ok(error, 'should not validate an invalid block')
-      st.end()
     }
+    st.end()
   })
 
   t.test('should add block with body', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
-    const genesisBlock = new Block(Buffer.from(testData.genesisRLP.slice(2), 'hex'))
-    await blockchain.putGenesis(genesisBlock)
-    const block = new Block(Buffer.from(testData.blocks[0].rlp.slice(2), 'hex'))
+
+    const genesisRlp = Buffer.from(testData.genesisRLP.slice(2), 'hex')
+    const genesis = Block.fromRLPSerializedBlock(genesisRlp, { initWithGenesisHeader: true })
+    await blockchain.putGenesis(genesis)
+
+    const blockRlp = Buffer.from(testData.blocks[0].rlp.slice(2), 'hex')
+    const block = Block.fromRLPSerializedBlock(blockRlp)
     await blockchain.putBlock(block)
     st.end()
   })
@@ -465,7 +491,7 @@ test('blockchain test', (t) => {
     if (!genesis) {
       return st.fail('genesis not defined!')
     }
-    const blockchain = new Blockchain({ db: db })
+    const blockchain = new Blockchain({ db })
 
     const number = await blockchain.dbManager.hashToNumber(genesis?.hash())
     st.ok(number.isZero(), 'should perform _hashToNumber correctly')
@@ -474,83 +500,78 @@ test('blockchain test', (t) => {
     st.ok(genesis.hash().equals(hash), 'should perform _numberToHash correctly')
 
     const td = await blockchain._getTd(genesis.hash(), new BN(0))
-    st.ok(td.toBuffer().equals(genesis.header.difficulty), 'should perform _getTd correctly')
+    st.ok(td.eq(genesis.header.difficulty), 'should perform _getTd correctly')
     st.end()
   })
 
   t.test('should save headers', async (st) => {
     const db = level()
-    let blockchain = new Blockchain({ db: db, validateBlocks: true, validatePow: false })
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    await blockchain.putGenesis(genesisBlock)
-    const header = new BlockHeader()
-    header.number = toBuffer(1)
-    header.parentHash = genesisBlock.hash()
-    header.difficulty = toBuffer(header.canonicalDifficulty(genesisBlock))
-    header.gasLimit = toBuffer(8000000)
-    header.timestamp = toBuffer(bufferToInt(genesisBlock.header.timestamp) + 1)
+    const gasLimit = 8000000
+
+    let blockchain = new Blockchain({ db, validateBlocks: true, validatePow: false })
+
+    const genesis = Block.genesis({ header: { gasLimit } })
+    await blockchain.putGenesis(genesis)
 
+    const headerData = {
+      number: 1,
+      parentHash: genesis.hash(),
+      difficulty: genesis.header.canonicalDifficulty(genesis),
+      gasLimit,
+      timestamp: genesis.header.timestamp.addn(1),
+    }
+    const header = BlockHeader.fromHeaderData(headerData)
     await blockchain.putHeader(header)
-    blockchain = new Blockchain({ db: db, validateBlocks: true, validatePow: false })
+
+    blockchain = new Blockchain({ db, validateBlocks: true, validatePow: false })
 
     const latestHeader = await blockchain.getLatestHeader()
     st.ok(latestHeader.hash().equals(header.hash()), 'should save headHeader')
 
     const latestBlock = await blockchain.getLatestBlock()
-    st.ok(latestBlock.hash().equals(genesisBlock.hash()), 'should save headBlock')
-    st.end()
-  })
-
-  t.test('immutable cached objects', async (st) => {
-    const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    await blockchain.putGenesis(genesisBlock)
-
-    const block = new Block()
-    block.header.number = toBuffer(1)
-    block.header.parentHash = genesisBlock.hash()
-    block.header.difficulty = toBuffer(block.header.canonicalDifficulty(genesisBlock))
-    block.header.gasLimit = toBuffer(8000000)
-    block.header.timestamp = toBuffer(bufferToInt(genesisBlock.header.timestamp) + 1)
-    let cachedHash: Buffer
-
-    await blockchain.putBlock(block)
-    cachedHash = block.hash()
-
-    block.header.extraData = Buffer.from([1])
-    const getBlock = await blockchain.getBlock(1)
-    st.ok(cachedHash.equals(getBlock.hash()), 'should not modify cached objects')
+    st.ok(latestBlock.hash().equals(genesis.hash()), 'should save headBlock')
     st.end()
   })
 
   t.test('should get latest', async (st) => {
     const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
+    const gasLimit = 8000000
     const common = new Common({ chain: 'mainnet', hardfork: 'chainstart' })
-    const headers = [new BlockHeader(undefined, { common }), new BlockHeader(undefined, { common })]
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    await blockchain.putGenesis(genesisBlock)
-
-    const block = new Block(undefined, { common })
-    block.header.number = toBuffer(1)
-    block.header.parentHash = genesisBlock.hash()
-    block.header.difficulty = toBuffer(block.header.canonicalDifficulty(genesisBlock))
-    block.header.gasLimit = toBuffer(8000000)
-    block.header.timestamp = toBuffer(bufferToInt(genesisBlock.header.timestamp) + 1)
-
-    headers[0].number = toBuffer(1)
-    headers[0].parentHash = genesisBlock.hash()
-    headers[0].difficulty = toBuffer(headers[0].canonicalDifficulty(genesisBlock))
-    headers[0].gasLimit = toBuffer(8000000)
-    headers[0].timestamp = toBuffer(bufferToInt(genesisBlock.header.timestamp) + 1)
-
-    headers[1].number = toBuffer(2)
-    headers[1].parentHash = headers[0].hash()
-    headers[1].difficulty = toBuffer(headers[1].canonicalDifficulty(block))
-    headers[1].gasLimit = toBuffer(8000000)
-    headers[1].timestamp = toBuffer(bufferToInt(block.header.timestamp) + 1)
+    const opts = { common }
+
+    const genesis = Block.genesis({ header: { gasLimit } }, opts)
+    await blockchain.putGenesis(genesis)
+
+    const blockData = {
+      header: {
+        number: 1,
+        parentHash: genesis.hash(),
+        difficulty: genesis.header.canonicalDifficulty(genesis),
+        timestamp: genesis.header.timestamp.addn(3),
+        gasLimit,
+      },
+    }
+    const block = Block.fromBlockData(blockData, opts)
+
+    const headerData1 = {
+      number: 1,
+      parentHash: genesis.hash(),
+      difficulty: genesis.header.canonicalDifficulty(genesis),
+      timestamp: genesis.header.timestamp.addn(1),
+      gasLimit,
+    }
+    const header1 = BlockHeader.fromHeaderData(headerData1, opts)
+    const headers = [header1]
+
+    const headerData2 = {
+      number: 2,
+      parentHash: header1.hash(),
+      difficulty: header1.canonicalDifficulty(block),
+      timestamp: header1.timestamp.addn(1),
+      gasLimit,
+    }
+    const header2 = BlockHeader.fromHeaderData(headerData2, opts)
+    headers.push(header2)
 
     await blockchain.putHeaders(headers)
 
@@ -558,9 +579,10 @@ test('blockchain test', (t) => {
     st.ok(latestHeader.hash().equals(headers[1].hash()), 'should update latest header')
 
     const latestBlock = await blockchain.getLatestBlock()
-    st.ok(latestBlock.hash().equals(genesisBlock.hash()), 'should not change latest block')
+    st.ok(latestBlock.hash().equals(genesis.hash()), 'should not change latest block')
 
     await blockchain.putBlock(block)
+
     const latestHeader2 = await blockchain.getLatestHeader()
     st.ok(latestHeader2.hash().equals(headers[1].hash()), 'should not change latest header')
 
@@ -571,27 +593,30 @@ test('blockchain test', (t) => {
 
   t.test('mismatched chains', async (st) => {
     const common = new Common({ chain: 'mainnet', hardfork: 'chainstart' })
-    const blockchain = new Blockchain({ common: common, validateBlocks: true, validatePow: false })
+    const blockchain = new Blockchain({ common, validateBlocks: true, validatePow: false })
+    const gasLimit = 8000000
+
+    const genesis = Block.genesis({ header: { gasLimit } }, { common })
+
+    const blockData1 = {
+      header: {
+        number: 1,
+        parentHash: genesis.hash(),
+        difficulty: genesis.header.canonicalDifficulty(genesis),
+        timestamp: genesis.header.timestamp.addn(1),
+        gasLimit,
+      },
+    }
+    const blockData2 = { ...blockData1, number: 2, timestamp: genesis.header.timestamp.addn(2) }
+
     const blocks = [
-      new Block(undefined, { common: common, initWithGenesisHeader: true }),
-      new Block(undefined, { common: new Common({ chain: 'mainnet', hardfork: 'chainstart' }) }),
-      new Block(undefined, { common: new Common({ chain: 'ropsten', hardfork: 'chainstart' }) }),
+      genesis,
+      Block.fromBlockData(blockData1, { common }),
+      Block.fromBlockData(blockData2, {
+        common: new Common({ chain: 'ropsten', hardfork: 'chainstart' }),
+      }),
     ]
 
-    blocks[0].header.gasLimit = toBuffer(8000000)
-
-    blocks[1].header.number = toBuffer(1)
-    blocks[1].header.parentHash = blocks[0].hash()
-    blocks[1].header.difficulty = toBuffer(blocks[1].header.canonicalDifficulty(blocks[0]))
-    blocks[1].header.gasLimit = toBuffer(8000000)
-    blocks[1].header.timestamp = toBuffer(bufferToInt(blocks[0].header.timestamp) + 1)
-
-    blocks[2].header.number = toBuffer(2)
-    blocks[2].header.parentHash = blocks[1].hash()
-    blocks[2].header.difficulty = toBuffer(blocks[2].header.canonicalDifficulty(blocks[0]))
-    blocks[2].header.gasLimit = toBuffer(8000000)
-    blocks[2].header.timestamp = toBuffer(bufferToInt(blocks[0].header.timestamp) + 2)
-
     for (let i = 0; i < blocks.length; i++) {
       if (i === 0) {
         await blockchain.putGenesis(blocks[i])
diff --git a/packages/blockchain/test/util.ts b/packages/blockchain/test/util.ts
index 5d9fd4d0d9..1d18ae7690 100644
--- a/packages/blockchain/test/util.ts
+++ b/packages/blockchain/test/util.ts
@@ -1,18 +1,12 @@
-import { rlp, toBuffer, bufferToInt } from 'ethereumjs-util'
-import BN = require('bn.js')
-import Blockchain from '../src'
-
-const util = require('util')
+import { BN, rlp } from 'ethereumjs-util'
 import { Block } from '@ethereumjs/block'
 import Common from '@ethereumjs/common'
+import Blockchain from '../src'
 const level = require('level-mem')
 
-export const generateBlockchain = async (
-  numberOfBlocks: number,
-  genesisBlock?: Block,
-): Promise<any> => {
+export const generateBlockchain = async (numberOfBlocks: number, genesis?: Block): Promise<any> => {
   const blockchain = new Blockchain({ validateBlocks: true, validatePow: false })
-  const existingBlocks: Block[] = genesisBlock ? [genesisBlock] : []
+  const existingBlocks: Block[] = genesis ? [genesis] : []
   const blocks = generateBlocks(numberOfBlocks, existingBlocks)
 
   try {
@@ -31,21 +25,31 @@ export const generateBlockchain = async (
 
 export const generateBlocks = (numberOfBlocks: number, existingBlocks?: Block[]): Block[] => {
   const blocks = existingBlocks ? existingBlocks : []
+
+  const gasLimit = 8000000
+  const common = new Common({ chain: 'mainnet', hardfork: 'chainstart' })
+  const opts = { common }
+
   if (blocks.length === 0) {
-    const genesisBlock = new Block(undefined, { initWithGenesisHeader: true })
-    genesisBlock.header.gasLimit = toBuffer(8000000)
-    blocks.push(genesisBlock)
+    const genesis = Block.genesis({ header: { gasLimit } }, opts)
+    blocks.push(genesis)
   }
-  const common = new Common({ chain: 'mainnet', hardfork: 'chainstart' })
+
   for (let i = blocks.length; i < numberOfBlocks; i++) {
-    const block = new Block(undefined, { common })
-    block.header.number = toBuffer(i)
-    block.header.parentHash = blocks[i - 1].hash()
-    block.header.difficulty = toBuffer(block.header.canonicalDifficulty(blocks[i - 1]))
-    block.header.gasLimit = toBuffer(8000000)
-    block.header.timestamp = toBuffer(bufferToInt(blocks[i - 1].header.timestamp) + 1)
+    const lastBlock = blocks[i - 1]
+    const blockData = {
+      header: {
+        number: i,
+        parentHash: lastBlock.hash(),
+        difficulty: lastBlock.header.canonicalDifficulty(lastBlock),
+        gasLimit,
+        timestamp: lastBlock.header.timestamp.addn(1),
+      },
+    }
+    const block = Block.fromBlockData(blockData, opts)
     blocks.push(block)
   }
+
   return blocks
 }
 
@@ -61,7 +65,7 @@ export const isConsecutive = (blocks: Block[]) => {
 }
 
 export const createTestDB = async () => {
-  const genesis = new Block(undefined, { initWithGenesisHeader: true })
+  const genesis = Block.genesis()
   const db = level()
   await db.batch([
     {
@@ -100,7 +104,7 @@ export const createTestDB = async () => {
       ),
       keyEncoding: 'binary',
       valueEncoding: 'binary',
-      value: rlp.encode(genesis.header.raw),
+      value: genesis.header.serialize(),
     },
     {
       type: 'put',
@@ -120,7 +124,7 @@ export const createTestDB = async () => {
       ),
       keyEncoding: 'binary',
       valueEncoding: 'binary',
-      value: rlp.encode(genesis.serialize(false).slice(1)),
+      value: rlp.encode(genesis.raw().slice(1)),
     },
     {
       type: 'put',
diff --git a/packages/ethash/package.json b/packages/ethash/package.json
index 6e5e789a69..740c8eceb7 100644
--- a/packages/ethash/package.json
+++ b/packages/ethash/package.json
@@ -35,7 +35,7 @@
   "dependencies": {
     "@types/levelup": "^4.3.0",
     "buffer-xor": "^2.0.1",
-    "ethereumjs-util": "^7.0.5",
+    "ethereumjs-util": "^7.0.6",
     "miller-rabin": "^4.0.0"
   },
   "devDependencies": {
diff --git a/packages/ethash/src/index.ts b/packages/ethash/src/index.ts
index 1393e8cae7..435795d669 100644
--- a/packages/ethash/src/index.ts
+++ b/packages/ethash/src/index.ts
@@ -197,8 +197,8 @@ export default class Ethash {
   }
 
   async _verifyPOW(header: BlockHeader) {
-    const headerHash = this.headerHash(header.raw)
-    const number = bufferToInt(header.number)
+    const headerHash = this.headerHash(header.raw())
+    const number = header.number.toNumber()
     const mixHash = header.mixHash
     const difficulty = new BN(header.difficulty)
 
diff --git a/packages/ethash/test/block.spec.ts b/packages/ethash/test/block.spec.ts
index f4e75d5b94..e038204902 100644
--- a/packages/ethash/test/block.spec.ts
+++ b/packages/ethash/test/block.spec.ts
@@ -1,6 +1,6 @@
 import * as tape from 'tape'
-import Ethash from '../src'
 import { Block } from '@ethereumjs/block'
+import Ethash from '../src'
 const level = require('level-mem')
 
 const cacheDB = level()
@@ -13,16 +13,19 @@ const {
 tape('Verify POW for valid and invalid blocks', async function (t) {
   const e = new Ethash(cacheDB)
 
-  const genesis = new Block(undefined, { initWithGenesisHeader: true })
-  const genesisBlockResult = await e.verifyPOW(genesis)
-  t.ok(genesisBlockResult, 'genesis block should be valid')
+  const genesis = Block.genesis()
+  const genesisResult = await e.verifyPOW(genesis)
+  t.ok(genesisResult, 'genesis block should be valid')
 
-  const validBlock = new Block(Buffer.from(validBlockRlp, 'hex'))
+  const validRlp = Buffer.from(validBlockRlp, 'hex')
+  const validBlock = Block.fromRLPSerializedBlock(validRlp)
   const validBlockResult = await e.verifyPOW(validBlock)
   t.ok(validBlockResult, 'should be valid')
 
-  const invalidBlock = new Block(Buffer.from(invalidBlockRlp, 'hex'))
+  const invalidRlp = Buffer.from(invalidBlockRlp, 'hex')
+  const invalidBlock = Block.fromRLPSerializedBlock(invalidRlp)
   const invalidBlockResult = await e.verifyPOW(invalidBlock)
   t.ok(!invalidBlockResult, 'should be invalid')
+
   t.end()
 })
diff --git a/packages/ethash/test/ethash.spec.ts b/packages/ethash/test/ethash.spec.ts
index 4c31fb5ace..6870da486e 100644
--- a/packages/ethash/test/ethash.spec.ts
+++ b/packages/ethash/test/ethash.spec.ts
@@ -11,16 +11,19 @@ const tests = Object.keys(powTests)
 tape('POW tests', function (t) {
   tests.forEach(function (key) {
     const test = powTests[key]
-    const header = new BlockHeader(Buffer.from(test.header, 'hex'))
+    const header = BlockHeader.fromRLPSerializedHeader(
+      Buffer.from(test.header, 'hex'),
+      {}
+    )
 
-    const headerHash = ethash.headerHash(header.raw)
+    const headerHash = ethash.headerHash(header.raw())
     t.equal(
       headerHash.toString('hex'),
       test.header_hash,
       'generate header hash'
     )
 
-    const epoc = getEpoc(bufferToInt(header.number))
+    const epoc = getEpoc(header.number.toNumber())
     t.equal(getCacheSize(epoc), test.cache_size, 'generate cache size')
     t.equal(getFullSize(epoc), test.full_size, 'generate full cache size')
 
diff --git a/packages/tx/package.json b/packages/tx/package.json
index 13d3ff5d5f..d1dfb7f0c5 100644
--- a/packages/tx/package.json
+++ b/packages/tx/package.json
@@ -32,7 +32,7 @@
   "license": "MPL-2.0",
   "dependencies": {
     "@ethereumjs/common": "^1.5.1",
-    "ethereumjs-util": "^7.0.5"
+    "ethereumjs-util": "^7.0.6"
   },
   "devDependencies": {
     "@ethereumjs/config-nyc": "^1.1.1",
diff --git a/packages/tx/src/transaction.ts b/packages/tx/src/transaction.ts
index 25ca9aa1fa..c758763b0c 100644
--- a/packages/tx/src/transaction.ts
+++ b/packages/tx/src/transaction.ts
@@ -1,18 +1,19 @@
 import { Buffer } from 'buffer'
 import {
+  Address,
   BN,
+  bnToRlp,
   ecrecover,
-  rlphash,
-  publicToAddress,
   ecsign,
-  toBuffer,
   rlp,
+  rlphash,
+  toBuffer,
   unpadBuffer,
+  publicToAddress,
   MAX_INTEGER,
-  Address,
 } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
-import { TxOptions, TxData, JsonTx, bnToRlp, bnToHex } from './types'
+import { TxOptions, TxData, JsonTx, bnToHex } from './types'
 
 // secp256k1n/2
 const N_DIV_2 = new BN('7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0', 16)
@@ -36,15 +37,15 @@ export default class Transaction {
     const { nonce, gasLimit, gasPrice, to, value, data, v, r, s } = txData
 
     return new Transaction(
-      new BN(toBuffer(nonce || '0x')),
-      new BN(toBuffer(gasPrice || '0x')),
-      new BN(toBuffer(gasLimit || '0x')),
+      new BN(toBuffer(nonce)),
+      new BN(toBuffer(gasPrice)),
+      new BN(toBuffer(gasLimit)),
       to ? new Address(toBuffer(to)) : undefined,
-      new BN(toBuffer(value || '0x')),
-      toBuffer(data || '0x'),
-      new BN(toBuffer(v || '0x')),
-      new BN(toBuffer(r || '0x')),
-      new BN(toBuffer(s || '0x')),
+      new BN(toBuffer(value)),
+      toBuffer(data),
+      new BN(toBuffer(v)),
+      new BN(toBuffer(r)),
+      new BN(toBuffer(s)),
       opts,
     )
   }
@@ -146,9 +147,9 @@ export default class Transaction {
       this.to !== undefined ? this.to.buf : Buffer.from([]),
       bnToRlp(this.value),
       this.data,
-      bnToRlp(this.v),
-      bnToRlp(this.r),
-      bnToRlp(this.s),
+      this.v ? bnToRlp(this.v) : Buffer.from([]),
+      this.r ? bnToRlp(this.r) : Buffer.from([]),
+      this.s ? bnToRlp(this.s) : Buffer.from([]),
     ]
 
     return rlphash(values)
@@ -189,12 +190,17 @@ export default class Transaction {
       )
     }
 
+    const { v, r, s } = this
+    if (!v || !r || !s) {
+      throw new Error('Missing values to derive sender public key from signed tx')
+    }
+
     try {
       return ecrecover(
         msgHash,
-        this.v!.toNumber(),
-        bnToRlp(this.r),
-        bnToRlp(this.s),
+        v.toNumber(),
+        bnToRlp(r),
+        bnToRlp(s),
         this._signedTxImplementsEIP155() ? this.getChainId() : undefined,
       )
     } catch (e) {
@@ -307,10 +313,10 @@ export default class Transaction {
   }
 
   /**
-   * Returns the rlp encoding of the transaction
+   * Returns a Buffer Array of the raw Buffers of this transaction, in order.
    */
-  serialize(): Buffer {
-    return rlp.encode([
+  raw(): Buffer[] {
+    return [
       bnToRlp(this.nonce),
       bnToRlp(this.gasPrice),
       bnToRlp(this.gasLimit),
@@ -320,7 +326,14 @@ export default class Transaction {
       this.v !== undefined ? bnToRlp(this.v) : Buffer.from([]),
       this.r !== undefined ? bnToRlp(this.r) : Buffer.from([]),
       this.s !== undefined ? bnToRlp(this.s) : Buffer.from([]),
-    ])
+    ]
+  }
+
+  /**
+   * Returns the rlp encoding of the transaction.
+   */
+  serialize(): Buffer {
+    return rlp.encode(this.raw())
   }
 
   /**
diff --git a/packages/tx/src/types.ts b/packages/tx/src/types.ts
index 8083011a80..2561d648c3 100644
--- a/packages/tx/src/types.ts
+++ b/packages/tx/src/types.ts
@@ -1,4 +1,4 @@
-import { BN, unpadBuffer, Address } from 'ethereumjs-util'
+import { Address, BN, BNLike, BufferLike } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
 
 /**
@@ -81,38 +81,16 @@ export interface JsonTx {
 }
 
 /**
- * Any object that can be transformed into a `Buffer`
+ * Convert BN to 0x-prefixed hex string.
+ * TODO: Move to ethereumjs-util
  */
-export interface TransformableToBuffer {
-  toBuffer(): Buffer
+export function bnToHex(value: BN): string {
+  return `0x${value.toString(16)}`
 }
 
 /**
- * A hex string prefixed with `0x`.
- */
-export type PrefixedHexString = string
-
-/**
- * A Buffer, hex string prefixed with `0x`, Number, or an object with a `toBuffer()` method such as BN.
+ * A type that represents an Address-like value.
+ * To convert to address, use `new Address(toBuffer(value))
+ * TODO: Move to ethereumjs-util
  */
-export type BufferLike = Buffer | TransformableToBuffer | PrefixedHexString | number
-
 export type AddressLike = Address | Buffer | string
-
-export type BNLike = BN | string | number
-
-/**
- * Convert BN to its RLP representation.
- */
-export function bnToRlp(value: BN | undefined): Buffer {
-  // using bn.js `toArrayLike(Buffer)` instead of `toBuffer()`
-  // for compatibility with browserify and similar tools
-  return value ? unpadBuffer(value.toArrayLike(Buffer)) : Buffer.from([])
-}
-
-/**
- * Convert BN to hex.
- */
-export function bnToHex(value: BN): string {
-  return `0x${value.toString(16)}`
-}
diff --git a/packages/vm/README.md b/packages/vm/README.md
index f7783c79ee..79657be1cf 100644
--- a/packages/vm/README.md
+++ b/packages/vm/README.md
@@ -69,12 +69,12 @@ Currently supported EIPs are:
 # USAGE
 
 ```javascript
-const BN = require('bn.js')
-const VM = require('@ethereumjs/vm').default
+import { BN } from 'ethereumjs-util'
+import Common from '@ethereumjs/common'
+import VM from '@ethereumjs/vm'
 
-// Create a new VM instance
-// For explicity setting the HF use e.g. `new VM({ hardfork: 'petersburg' })`
-const vm = new VM()
+const common = new Common({ chain: 'mainnet', hardfork: 'istanbul' })
+const vm = new VM({ common })
 
 const STOP = '00'
 const ADD = '01'
@@ -92,10 +92,10 @@ vm.runCode({
   gasLimit: new BN(0xffff),
 })
   .then((results) => {
-    console.log('Returned : ' + results.returnValue.toString('hex'))
-    console.log('gasUsed  : ' + results.gasUsed.toString())
+    console.log(`Returned: ${results.returnValue.toString('hex')}`)
+    console.log(`gasUsed : ${results.gasUsed.toString()}`)
   })
-  .catch((err) => console.log('Error    : ' + err))
+  .catch(console.error)
 ```
 
 ## Example
diff --git a/packages/vm/examples/run-blockchain/index.ts b/packages/vm/examples/run-blockchain/index.ts
index 681f8dc864..2b1b40d074 100644
--- a/packages/vm/examples/run-blockchain/index.ts
+++ b/packages/vm/examples/run-blockchain/index.ts
@@ -1,10 +1,9 @@
-import VM from '../../'
-
 import Account from '@ethereumjs/account'
 import { Block, BlockHeader } from '@ethereumjs/block'
 import Blockchain from '@ethereumjs/blockchain'
 import { toBuffer, setLengthLeft } from 'ethereumjs-util'
 import Common from '@ethereumjs/common'
+import VM from '../../'
 
 const testData = require('./test-data')
 const level = require('level')
@@ -72,14 +71,15 @@ async function setupPreConditions(vm: VM, testData: any) {
 }
 
 async function setGenesisBlock(blockchain: any, common: Common) {
-  const header = new BlockHeader(testData.genesisBlockHeader, { common })
-  const genesisBlock = new Block([header.raw, [], []], { common })
-  await blockchain.putGenesis(genesisBlock)
+  const header = testData.genesisBlockHeader
+  const genesis = Block.genesis({ header }, { common })
+  await blockchain.putGenesis(genesis)
 }
 
 async function putBlocks(blockchain: any, common: Common, testData: any) {
   for (const blockData of testData.blocks) {
-    const block = new Block(toBuffer(blockData.rlp), { common })
+    const blockRlp = toBuffer(blockData.rlp)
+    const block = Block.fromRLPSerializedBlock(blockRlp, { common })
     await blockchain.putBlock(block)
   }
 }
diff --git a/packages/vm/examples/run-code-browser/index.js b/packages/vm/examples/run-code-browser/index.js
index 338b4f514b..29d5bfc7bb 100644
--- a/packages/vm/examples/run-code-browser/index.js
+++ b/packages/vm/examples/run-code-browser/index.js
@@ -30,7 +30,7 @@ vm.runCode({
   gasLimit: new BN(0xffff),
 })
   .then((results) => {
-    console.log('Returned : ' + results.returnValue.toString('hex'))
-    console.log('gasUsed  : ' + results.gasUsed.toString())
+    console.log(`Returned: ${results.returnValue.toString('hex')}`)
+    console.log(`gasUsed : ${results.gasUsed.toString()}`)
   })
   .catch(console.error)
diff --git a/packages/vm/lib/evm/eei.ts b/packages/vm/lib/evm/eei.ts
index 2ec19a29d4..020462acfd 100644
--- a/packages/vm/lib/evm/eei.ts
+++ b/packages/vm/lib/evm/eei.ts
@@ -245,35 +245,35 @@ export default class EEI {
    * Returns the block’s number.
    */
   getBlockNumber(): BN {
-    return new BN(this._env.block.header.number)
+    return this._env.block.header.number
   }
 
   /**
    * Returns the block's beneficiary address.
    */
   getBlockCoinbase(): BN {
-    return new BN(this._env.block.header.coinbase)
+    return new BN(this._env.block.header.coinbase.buf)
   }
 
   /**
    * Returns the block's timestamp.
    */
   getBlockTimestamp(): BN {
-    return new BN(this._env.block.header.timestamp)
+    return this._env.block.header.timestamp
   }
 
   /**
    * Returns the block's difficulty.
    */
   getBlockDifficulty(): BN {
-    return new BN(this._env.block.header.difficulty)
+    return this._env.block.header.difficulty
   }
 
   /**
    * Returns the block's gas limit.
    */
   getBlockGasLimit(): BN {
-    return new BN(this._env.block.header.gasLimit)
+    return this._env.block.header.gasLimit
   }
 
   /**
diff --git a/packages/vm/lib/runBlock.ts b/packages/vm/lib/runBlock.ts
index 0076bd6a29..17233ac41c 100644
--- a/packages/vm/lib/runBlock.ts
+++ b/packages/vm/lib/runBlock.ts
@@ -1,11 +1,12 @@
-import { BaseTrie as Trie } from 'merkle-patricia-tree'
-import { BN, toBuffer } from 'ethereumjs-util'
 import { encode } from 'rlp'
+import { BaseTrie as Trie } from 'merkle-patricia-tree'
+import { Address, BN, toBuffer } from 'ethereumjs-util'
+import { Block } from '@ethereumjs/block'
+import Account from '@ethereumjs/account'
 import VM from './index'
 import Bloom from './bloom'
 import { RunTxResult } from './runTx'
 import { StateManager } from './state/index'
-import Account from '@ethereumjs/account'
 
 import * as DAOConfig from './config/dao_fork_accounts_config.json'
 
@@ -109,7 +110,8 @@ export interface PostByzantiumTxReceipt extends TxReceipt {
  */
 export default async function runBlock(this: VM, opts: RunBlockOpts): Promise<RunBlockResult> {
   const state = this.stateManager
-  const block = opts.block
+  const { root } = opts
+  let { block } = opts
   const generateStateRoot = !!opts.generate
 
   /**
@@ -119,17 +121,17 @@ export default async function runBlock(this: VM, opts: RunBlockOpts): Promise<Ru
    * @type {Object}
    * @property {Block} block emits the block that is about to be processed
    */
-  await this._emit('beforeBlock', opts.block)
+  await this._emit('beforeBlock', block)
 
   // Set state root if provided
-  if (opts.root) {
-    await state.setStateRoot(opts.root)
+  if (root) {
+    await state.setStateRoot(root)
   }
 
   // check for DAO support and if we should apply the DAO fork
   if (
     this._common.hardforkIsActiveOnChain('dao') &&
-    new BN(opts.block.header.number).eq(new BN(this._common.hardforkBlock('dao')))
+    block.header.number.eq(new BN(this._common.hardforkBlock('dao')))
   ) {
     await _applyDAOHardfork(state)
   }
@@ -152,8 +154,8 @@ export default async function runBlock(this: VM, opts: RunBlockOpts): Promise<Ru
   // values to the current block, or validate the resulting
   // header values against the current block.
   if (generateStateRoot) {
-    block.header.stateRoot = stateRoot
-    block.header.bloom = result.bloom.bitvector
+    const bloom = result.bloom.bitvector
+    block = Block.fromBlockData({ ...block, header: { ...block.header, stateRoot, bloom } })
   } else {
     if (result.receiptRoot && !result.receiptRoot.equals(block.header.receiptTrie)) {
       throw new Error('invalid receiptTrie')
@@ -161,7 +163,7 @@ export default async function runBlock(this: VM, opts: RunBlockOpts): Promise<Ru
     if (!result.bloom.bitvector.equals(block.header.bloom)) {
       throw new Error('invalid bloom')
     }
-    if (!result.gasUsed.eq(new BN(block.header.gasUsed))) {
+    if (!result.gasUsed.eq(block.header.gasUsed)) {
       throw new Error('invalid gasUsed')
     }
     if (!stateRoot.equals(block.header.stateRoot)) {
@@ -169,6 +171,8 @@ export default async function runBlock(this: VM, opts: RunBlockOpts): Promise<Ru
     }
   }
 
+  const { receipts, results } = result
+
   /**
    * The `afterBlock` event
    *
@@ -176,12 +180,9 @@ export default async function runBlock(this: VM, opts: RunBlockOpts): Promise<Ru
    * @type {Object}
    * @property {Object} result emits the results of processing a block
    */
-  await this._emit('afterBlock', {
-    receipts: result.receipts,
-    results: result.results,
-  })
+  await this._emit('afterBlock', { receipts, results })
 
-  return { receipts: result.receipts, results: result.results }
+  return { receipts, results }
 }
 
 /**
@@ -195,7 +196,7 @@ export default async function runBlock(this: VM, opts: RunBlockOpts): Promise<Ru
 async function applyBlock(this: VM, block: any, opts: RunBlockOpts) {
   // Validate block
   if (!opts.skipBlockValidation) {
-    if (new BN(block.header.gasLimit).gte(new BN('8000000000000000', 16))) {
+    if (block.header.gasLimit.gte(new BN('8000000000000000', 16))) {
       throw new Error('Invalid block with gas limit greater than (2^63 - 1)')
     } else {
       await block.validate(this.blockchain)
@@ -287,7 +288,7 @@ async function applyTransactions(this: VM, block: any, opts: RunBlockOpts) {
  * Calculates block rewards for miner and ommers and puts
  * the updated balances of their accounts to state.
  */
-async function assignBlockRewards(this: VM, block: any): Promise<void> {
+async function assignBlockRewards(this: VM, block: Block): Promise<void> {
   const state = this.stateManager
   const minerReward = new BN(this._common.param('pow', 'minerReward'))
   const ommers = block.uncleHeaders
@@ -322,10 +323,10 @@ function calculateMinerReward(minerReward: BN, ommersNum: number): BN {
   return reward
 }
 
-async function rewardAccount(state: StateManager, address: Buffer, reward: BN): Promise<void> {
-  const account = await state.getAccount(address)
+async function rewardAccount(state: StateManager, address: Address, reward: BN): Promise<void> {
+  const account = await state.getAccount(address.buf)
   account.balance = toBuffer(new BN(account.balance).add(reward))
-  await state.putAccount(address, account)
+  await state.putAccount(address.buf, account)
 }
 
 // apply the DAO fork changes to the VM
diff --git a/packages/vm/lib/runCall.ts b/packages/vm/lib/runCall.ts
index b00409227f..85370be238 100644
--- a/packages/vm/lib/runCall.ts
+++ b/packages/vm/lib/runCall.ts
@@ -1,15 +1,15 @@
 import { BN, zeros } from 'ethereumjs-util'
+import { Block } from '@ethereumjs/block'
 import VM from './index'
 import TxContext from './evm/txContext'
 import Message from './evm/message'
 import { default as EVM, EVMResult } from './evm/evm'
-import { Block } from '@ethereumjs/block'
 
 /**
  * Options for running a call (or create) operation
  */
 export interface RunCallOpts {
-  block?: any
+  block?: Block
   gasPrice?: BN
   origin?: Buffer
   caller?: Buffer
diff --git a/packages/vm/lib/runCode.ts b/packages/vm/lib/runCode.ts
index b530823f12..35c8e8d400 100644
--- a/packages/vm/lib/runCode.ts
+++ b/packages/vm/lib/runCode.ts
@@ -12,11 +12,11 @@ not all stack items are 32 bytes, so if the operation relies on the stack
 item length then you must use utils.pad(<item>, 32) first.
 */
 import { BN, zeros } from 'ethereumjs-util'
+import { Block } from '@ethereumjs/block'
 import VM from './index'
 import TxContext from './evm/txContext'
 import Message from './evm/message'
 import { default as EVM, ExecResult } from './evm/evm'
-import { Block } from '@ethereumjs/block'
 
 /**
  * Options for the [[runCode]] method.
@@ -25,7 +25,7 @@ export interface RunCodeOpts {
   /**
    * The [`Block`](https://github.com/ethereumjs/ethereumjs-block) the `tx` belongs to. If omitted a blank block will be used
    */
-  block?: any
+  block?: Block
   evm?: EVM
   txContext?: TxContext
   gasPrice?: BN
diff --git a/packages/vm/lib/runTx.ts b/packages/vm/lib/runTx.ts
index 8068166c58..5b650869a7 100644
--- a/packages/vm/lib/runTx.ts
+++ b/packages/vm/lib/runTx.ts
@@ -14,7 +14,7 @@ export interface RunTxOpts {
   /**
    * The block to which the `tx` belongs
    */
-  block?: any
+  block?: Block
   /**
    * An [`@ethereumjs/tx`](https://github.com/ethereumjs/ethereumjs-vm/tree/master/packages/tx) to run
    */
@@ -58,11 +58,11 @@ export default async function runTx(this: VM, opts: RunTxOpts): Promise<RunTxRes
 
   // create a reasonable default if no block is given
   if (!opts.block) {
-    const common = (<any>opts.tx)._common
-    opts.block = new Block(undefined, { common })
+    const common = opts.tx.common
+    opts.block = Block.fromBlockData({}, { common })
   }
 
-  if (new BN(opts.block.header.gasLimit).lt(opts.tx.gasLimit)) {
+  if (opts.block.header.gasLimit.lt(opts.tx.gasLimit)) {
     throw new Error('tx has a higher gas limit than the block')
   }
 
@@ -80,9 +80,8 @@ export default async function runTx(this: VM, opts: RunTxOpts): Promise<RunTxRes
 }
 
 async function _runTx(this: VM, opts: RunTxOpts): Promise<RunTxResult> {
-  const block = opts.block
-  const tx = opts.tx
   const state = this.stateManager
+  const { tx, block } = opts
 
   /**
    * The `beforeTx` event
@@ -132,7 +131,7 @@ async function _runTx(this: VM, opts: RunTxOpts): Promise<RunTxResult> {
    * Execute message
    */
   const txContext = new TxContext(tx.gasPrice, caller)
-  const to = tx.to && tx.to.buf.length !== 0 ? tx.to.buf : undefined
+  const to = tx.to && tx.to.buf.length > 0 ? tx.to.buf : undefined
   const { value, data } = tx
   const message = new Message({
     caller,
@@ -153,7 +152,7 @@ async function _runTx(this: VM, opts: RunTxOpts): Promise<RunTxResult> {
   results.gasUsed.iadd(basefee)
   // Process any gas refund
   const gasRefund = evm._refund
-  if (gasRefund) {
+  if (gasRefund.gtn(0)) {
     if (gasRefund.lt(results.gasUsed.divn(2))) {
       results.gasUsed.isub(gasRefund)
     } else {
@@ -172,14 +171,15 @@ async function _runTx(this: VM, opts: RunTxOpts): Promise<RunTxResult> {
   await state.putAccount(caller, fromAccount)
 
   // Update miner's balance
-  const minerAccount = await state.getAccount(block.header.coinbase)
+  const minerBuf = block!.header.coinbase.buf
+  const minerAccount = await state.getAccount(minerBuf)
   // add the amount spent on gas to the miner's account
   minerAccount.balance = new BN(minerAccount.balance).add(results.amountSpent).toArrayLike(Buffer)
 
   // Put the miner account into the state. If the balance of the miner account remains zero, note that
   // the state.putAccount function puts this into the "touched" accounts. This will thus be removed when
   // we clean the touched accounts below in case we are in a fork >= SpuriousDragon
-  await state.putAccount(block.header.coinbase, minerAccount)
+  await state.putAccount(minerBuf, minerAccount)
 
   /*
    * Cleanup accounts
diff --git a/packages/vm/package.json b/packages/vm/package.json
index 68227dd668..a73fb539b7 100644
--- a/packages/vm/package.json
+++ b/packages/vm/package.json
@@ -50,7 +50,7 @@
     "@ethereumjs/blockchain": "^4.0.3",
     "@ethereumjs/common": "^1.5.1",
     "@ethereumjs/tx": "^2.1.2",
-    "ethereumjs-util": "^7.0.5",
+    "ethereumjs-util": "^7.0.6",
     "functional-red-black-tree": "^1.0.1",
     "merkle-patricia-tree": "^4.0.0",
     "rustbn.js": "~0.2.0",
diff --git a/packages/vm/scripts/benchmarks/mainnetBlocks.ts b/packages/vm/scripts/benchmarks/mainnetBlocks.ts
index 02c706024b..de997a8dbc 100644
--- a/packages/vm/scripts/benchmarks/mainnetBlocks.ts
+++ b/packages/vm/scripts/benchmarks/mainnetBlocks.ts
@@ -1,6 +1,6 @@
 import * as fs from 'fs'
 import Account from '@ethereumjs/account'
-import { bufferToInt, toBuffer, setLengthLeft } from 'ethereumjs-util'
+import { toBuffer, setLengthLeft } from 'ethereumjs-util'
 import { encode } from 'rlp'
 import blockFromRPC from '@ethereumjs/block/dist/from-rpc'
 import VM from '../../dist'
@@ -32,7 +32,7 @@ async function main() {
 
   for (const blockData of data) {
     const block = blockFromRPC(blockData.block)
-    const blockNumber = bufferToInt(block.header.number)
+    const blockNumber = block.header.number.toString()
 
     const stateManager = await getPreState(blockData.preState)
     const vm = new VM({
diff --git a/packages/vm/tests/BlockchainTestsRunner.ts b/packages/vm/tests/BlockchainTestsRunner.ts
index 27809011e0..4b6360cc21 100644
--- a/packages/vm/tests/BlockchainTestsRunner.ts
+++ b/packages/vm/tests/BlockchainTestsRunner.ts
@@ -1,5 +1,5 @@
 import * as tape from 'tape'
-import { addHexPrefix, bufferToInt, toBuffer } from 'ethereumjs-util'
+import { addHexPrefix, BN, toBuffer } from 'ethereumjs-util'
 import { SecureTrie as Trie } from 'merkle-patricia-tree'
 import { Block } from '@ethereumjs/block'
 import Blockchain from '@ethereumjs/blockchain'
@@ -67,20 +67,21 @@ export default async function runBlockchainTest(options: any, testData: any, t:
   })
 
   // create and add genesis block
-  const blockData = { header: formatBlockHeader(testData.genesisBlockHeader) }
-  const genesisBlock = new Block(blockData, { common })
+  const header = formatBlockHeader(testData.genesisBlockHeader)
+  const blockData = { header }
+  const genesis = Block.fromBlockData(blockData, { common })
 
   // set up pre-state
   await setupPreConditions(vm.stateManager._trie, testData)
 
-  t.ok(vm.stateManager._trie.root.equals(genesisBlock.header.stateRoot), 'correct pre stateRoot')
+  t.ok(vm.stateManager._trie.root.equals(genesis.header.stateRoot), 'correct pre stateRoot')
 
   if (testData.genesisRLP) {
     const rlp = toBuffer(testData.genesisRLP)
-    t.ok(genesisBlock.serialize().equals(rlp), 'correct genesis RLP')
+    t.ok(genesis.serialize().equals(rlp), 'correct genesis RLP')
   }
 
-  await blockchain.putGenesis(genesisBlock)
+  await blockchain.putGenesis(genesis)
 
   async function handleError(error: string | undefined, expectException: string) {
     if (expectException) {
@@ -92,8 +93,8 @@ export default async function runBlockchainTest(options: any, testData: any, t:
   }
 
   let currentFork = common.hardfork()
-  let currentBlock = 0
-  let lastBlock = 0
+  let currentBlock = new BN(0)
+  let lastBlock = new BN(0)
   for (const raw of testData.blocks) {
     lastBlock = currentBlock
     const paramFork = `expectException${options.forkConfigTestSuite}`
@@ -108,16 +109,15 @@ export default async function runBlockchainTest(options: any, testData: any, t:
     // here we convert the rlp to block only to extract the number
     // we have to do this again later because the common might run on a new hardfork
     try {
-      const block = new Block(Buffer.from(raw.rlp.slice(2), 'hex'), {
-        common,
-      })
-      currentBlock = bufferToInt(block.header.number)
+      const blockRlp = Buffer.from(raw.rlp.slice(2), 'hex')
+      const block = Block.fromRLPSerializedBlock(blockRlp, { common })
+      currentBlock = block.header.number
     } catch (e) {
       handleError(e, expectException)
       continue
     }
 
-    if (currentBlock < lastBlock) {
+    if (currentBlock.lt(lastBlock)) {
       // "re-org": rollback the blockchain to currentBlock (i.e. delete that block number in the blockchain plus the children)
       t.fail('re-orgs are not supported by the test suite')
       return
@@ -131,8 +131,8 @@ export default async function runBlockchainTest(options: any, testData: any, t:
         vm._updateOpcodes()
       }
 
-      const blockData = Buffer.from(raw.rlp.slice(2), 'hex')
-      const block = new Block(blockData, { common })
+      const blockRlp = Buffer.from(raw.rlp.slice(2), 'hex')
+      const block = Block.fromRLPSerializedBlock(blockRlp, { common })
       await blockchain.putBlock(block)
 
       // This is a trick to avoid generating the canonical genesis
@@ -165,7 +165,7 @@ export default async function runBlockchainTest(options: any, testData: any, t:
       }
     } catch (error) {
       // caught an error, reduce block number
-      currentBlock--
+      currentBlock.isubn(1)
       await handleError(error, expectException)
     }
   }
diff --git a/packages/vm/tests/GeneralStateTestsRunner.ts b/packages/vm/tests/GeneralStateTestsRunner.ts
index 2dddfc01a9..b54644b366 100644
--- a/packages/vm/tests/GeneralStateTestsRunner.ts
+++ b/packages/vm/tests/GeneralStateTestsRunner.ts
@@ -70,20 +70,17 @@ async function runTestCase(options: any, testData: any, t: tape.Test) {
 
   const common = new Common({ chain: 'mainnet', hardfork, eips })
 
-  const vm = new VM({
-    state,
-    common: common,
-  })
+  const vm = new VM({ state, common })
 
   await setupPreConditions(vm.stateManager._trie, testData)
 
-  const tx = makeTx(testData.transaction, common)
+  const tx = makeTx(testData.transaction, { common })
 
   if (!tx.validate()) {
     throw new Error('Transaction is invalid')
   }
 
-  const block = makeBlockFromEnv(testData.env)
+  const block = makeBlockFromEnv(testData.env, { common })
 
   if (options.jsontrace) {
     vm.on('step', function (e: any) {
diff --git a/packages/vm/tests/api/index.spec.ts b/packages/vm/tests/api/index.spec.ts
index b6ac43b9ee..ad8280676b 100644
--- a/packages/vm/tests/api/index.spec.ts
+++ b/packages/vm/tests/api/index.spec.ts
@@ -119,15 +119,15 @@ tape('VM with blockchain', (t) => {
   })
 
   t.test('should run blockchain with mocked runBlock', async (st) => {
-    const vm = setupVM({ common: new Common({ chain: 'goerli' }) })
+    const common = new Common({ chain: 'goerli' })
+    const vm = setupVM({ common })
     await vm.init()
 
-    const genesis = new Block(Buffer.from(testData.genesisRLP.slice(2), 'hex'), {
-      common: vm._common,
-    })
-    const block = new Block(Buffer.from(testData.blocks[0].rlp.slice(2), 'hex'), {
-      common: vm._common,
-    })
+    const genesisRlp = Buffer.from(testData.genesisRLP.slice(2), 'hex')
+    const genesis = Block.fromRLPSerializedBlock(genesisRlp, { common })
+
+    const blockRlp = Buffer.from(testData.blocks[0].rlp.slice(2), 'hex')
+    const block = Block.fromRLPSerializedBlock(blockRlp, { common })
 
     await vm.blockchain.putGenesis(genesis)
     st.equal(vm.blockchain.meta.genesis?.toString('hex'), testData.genesisBlockHeader.hash.slice(2))
@@ -150,14 +150,15 @@ tape('VM with blockchain', (t) => {
   })
 
   t.test('should run blockchain with blocks', async (st) => {
-    const vm = setupVM({ common: new Common({ chain: 'goerli' }) })
+    const common = new Common({ chain: 'goerli' })
+    const vm = setupVM({ common })
     await vm.init()
-    const genesis = new Block(toBuffer(testData.genesisRLP), {
-      common: vm._common,
-    })
-    const block = new Block(toBuffer(testData.blocks[0].rlp), {
-      common: vm._common,
-    })
+
+    const genesisRlp = toBuffer(testData.genesisRLP)
+    const genesis = Block.fromRLPSerializedBlock(genesisRlp, { common })
+
+    const blockRlp = toBuffer(testData.blocks[0].rlp)
+    const block = Block.fromRLPSerializedBlock(blockRlp, { common })
 
     await vm.blockchain.putGenesis(genesis)
     st.equal(vm.blockchain.meta.genesis?.toString('hex'), testData.genesisBlockHeader.hash.slice(2))
diff --git a/packages/vm/tests/api/runBlock.spec.ts b/packages/vm/tests/api/runBlock.spec.ts
index 608a439cd6..45ff01ee9e 100644
--- a/packages/vm/tests/api/runBlock.spec.ts
+++ b/packages/vm/tests/api/runBlock.spec.ts
@@ -5,8 +5,8 @@ import { Block } from '@ethereumjs/block'
 import { Transaction } from '@ethereumjs/tx'
 import { DefaultStateManager } from '../../lib/state'
 import runBlock from '../../lib/runBlock'
-import { setupVM, createAccount } from './utils'
 import { setupPreConditions, getDAOCommon } from '../util'
+import { setupVM, createAccount } from './utils'
 
 const testData = require('./testdata.json')
 
@@ -39,7 +39,8 @@ tape('runBlock', async (t) => {
   const suite = setup()
 
   t.test('should fail when runTx fails', async (st) => {
-    const block = new Block(rlp.decode(suite.data.blocks[0].rlp))
+    const blockRlp = suite.data.blocks[0].rlp
+    const block = Block.fromRLPSerializedBlock(blockRlp)
 
     // The mocked VM uses a mocked runTx
     // which always returns an error.
@@ -55,7 +56,7 @@ tape('runBlock', async (t) => {
 tape('should fail when block gas limit higher than 2^63-1', async (t) => {
   const suite = setup()
 
-  const block = new Block({
+  const block = Block.fromBlockData({
     header: {
       ...suite.data.blocks[0].header,
       gasLimit: Buffer.from('8000000000000000', 16),
@@ -72,7 +73,8 @@ tape('should fail when block gas limit higher than 2^63-1', async (t) => {
 tape('should fail when block validation fails', async (t) => {
   const suite = setup()
 
-  const block = new Block(rlp.decode(suite.data.blocks[0].rlp))
+  const blockRlp = suite.data.blocks[0].rlp
+  const block = Object.create(Block.fromRLPSerializedBlock(blockRlp))
   block.validate = async () => {
     throw new Error('test')
   }
@@ -88,12 +90,13 @@ tape('should fail when block validation fails', async (t) => {
 tape('should fail when tx gas limit higher than block gas limit', async (t) => {
   const suite = setup()
 
-  const block = new Block(rlp.decode(suite.data.blocks[0].rlp))
+  const blockRlp = suite.data.blocks[0].rlp
+  const block = Object.create(Block.fromRLPSerializedBlock(blockRlp))
   // modify first tx's gasLimit
   const { nonce, gasPrice, to, value, data, v, r, s } = block.transactions[0]
 
   const gasLimit = new BN(Buffer.from('3fefba', 'hex'))
-  const opts = { common: (<any>block)._common }
+  const opts = { common: block._common }
   block.transactions[0] = new Transaction(nonce, gasPrice, gasLimit, to, value, data, v, r, s, opts)
 
   await suite.p
@@ -108,8 +111,11 @@ tape('should run valid block', async (t) => {
   const vm = setupVM()
   const suite = setup(vm)
 
-  const genesis = new Block(rlp.decode(suite.data.genesisRLP))
-  const block = new Block(rlp.decode(suite.data.blocks[0].rlp))
+  const genesisRlp = suite.data.genesisRLP
+  const genesis = Block.fromRLPSerializedBlock(genesisRlp)
+
+  const blockRlp = suite.data.blocks[0].rlp
+  const block = Block.fromRLPSerializedBlock(blockRlp)
 
   await setupPreConditions(suite.vm.stateManager._trie, suite.data)
 
@@ -118,7 +124,7 @@ tape('should run valid block', async (t) => {
     'genesis state root should match calculated state root',
   )
 
-  let res = await suite.p.runBlock({
+  const res = await suite.p.runBlock({
     block,
     root: suite.vm.stateManager._trie.root,
     skipBlockValidation: true,
@@ -142,30 +148,29 @@ tape(
     const vm = setupVM({ common })
     const suite = setup(vm)
 
-    const genesis = new Block(rlp.decode(suite.data.genesisRLP))
     let block1: any = rlp.decode(suite.data.blocks[0].rlp)
     // edit extra data of this block to "dao-hard-fork"
     block1[0][12] = Buffer.from('dao-hard-fork')
-    const block = new Block(block1)
+    const block = Block.fromValuesArray(block1)
     await setupPreConditions(suite.vm.stateManager._trie, suite.data)
 
     // fill two original DAO child-contracts with funds and the recovery account with funds in order to verify that the balance gets summed correctly
-    let fundBalance1 = new BN(Buffer.from('1111', 'hex'))
-    let accountFunded1 = createAccount(new BN(0), fundBalance1)
-    let DAOFundedContractAddress1 = Buffer.from('d4fe7bc31cedb7bfb8a345f31e668033056b2728', 'hex')
+    const fundBalance1 = new BN(Buffer.from('1111', 'hex'))
+    const accountFunded1 = createAccount(new BN(0), fundBalance1)
+    const DAOFundedContractAddress1 = Buffer.from('d4fe7bc31cedb7bfb8a345f31e668033056b2728', 'hex')
     await suite.vm.stateManager.putAccount(DAOFundedContractAddress1, accountFunded1)
 
-    let fundBalance2 = new BN(Buffer.from('2222', 'hex'))
-    let accountFunded2 = createAccount(new BN(0), fundBalance2)
-    let DAOFundedContractAddress2 = Buffer.from('b3fb0e5aba0e20e5c49d252dfd30e102b171a425', 'hex')
+    const fundBalance2 = new BN(Buffer.from('2222', 'hex'))
+    const accountFunded2 = createAccount(new BN(0), fundBalance2)
+    const DAOFundedContractAddress2 = Buffer.from('b3fb0e5aba0e20e5c49d252dfd30e102b171a425', 'hex')
     await suite.vm.stateManager.putAccount(DAOFundedContractAddress2, accountFunded2)
 
-    let DAORefundAddress = Buffer.from('bf4ed7b27f1d666546e30d74d50d173d20bca754', 'hex')
-    let fundBalanceRefund = new BN(Buffer.from('4444', 'hex'))
-    let accountRefund = createAccount(new BN(0), fundBalanceRefund)
+    const DAORefundAddress = Buffer.from('bf4ed7b27f1d666546e30d74d50d173d20bca754', 'hex')
+    const fundBalanceRefund = new BN(Buffer.from('4444', 'hex'))
+    const accountRefund = createAccount(new BN(0), fundBalanceRefund)
     await suite.vm.stateManager.putAccount(DAORefundAddress, accountRefund)
 
-    let res = await suite.vm.runBlock({
+    const res = await suite.vm.runBlock({
       block,
       skipBlockValidation: true,
       generate: true,
@@ -173,16 +178,16 @@ tape(
 
     t.error(res.error, "runBlock shouldn't have returned error")
 
-    let DAOFundedContractAccount1 = await suite.vm.stateManager.getAccount(
+    const DAOFundedContractAccount1 = await suite.vm.stateManager.getAccount(
       DAOFundedContractAddress1,
     )
     t.true(DAOFundedContractAccount1.balance.equals(Buffer.from('', 'hex'))) // verify our funded account now has 0 balance
-    let DAOFundedContractAccount2 = await suite.vm.stateManager.getAccount(
+    const DAOFundedContractAccount2 = await suite.vm.stateManager.getAccount(
       DAOFundedContractAddress2,
     )
     t.true(DAOFundedContractAccount2.balance.equals(Buffer.from('', 'hex'))) // verify our funded account now has 0 balance
 
-    let DAORefundAccount = await suite.vm.stateManager.getAccount(DAORefundAddress)
+    const DAORefundAccount = await suite.vm.stateManager.getAccount(DAORefundAddress)
     t.true(DAORefundAccount.balance.equals(Buffer.from('7777', 'hex'))) // verify that the refund account gets the summed balance of the original refund account + two child DAO accounts
 
     t.end()
@@ -193,11 +198,12 @@ async function runWithHf(hardfork: string) {
   const vm = setupVM({ common: new Common({ chain: 'mainnet', hardfork }) })
   const suite = setup(vm)
 
-  const block = new Block(rlp.decode(suite.data.blocks[0].rlp))
+  const blockRlp = suite.data.blocks[0].rlp
+  const block = Block.fromRLPSerializedBlock(blockRlp)
 
   await setupPreConditions(suite.vm.stateManager._trie, suite.data)
 
-  let res = await suite.p.runBlock({
+  const res = await suite.p.runBlock({
     block,
     generate: true,
     skipBlockValidation: true,
diff --git a/packages/vm/tests/api/runBlockchain.spec.ts b/packages/vm/tests/api/runBlockchain.spec.ts
index 3203fb6bf6..b884b03617 100644
--- a/packages/vm/tests/api/runBlockchain.spec.ts
+++ b/packages/vm/tests/api/runBlockchain.spec.ts
@@ -1,11 +1,10 @@
 import * as tape from 'tape'
-import { BN, toBuffer } from 'ethereumjs-util'
+import { BN } from 'ethereumjs-util'
 import { Block } from '@ethereumjs/block'
 import Common from '@ethereumjs/common'
 import Blockchain from '@ethereumjs/blockchain'
 import runBlockchain from '../../lib/runBlockchain'
 import { DefaultStateManager } from '../../lib/state'
-import { createGenesis } from './utils'
 
 const level = require('level-mem')
 
@@ -48,7 +47,7 @@ tape('runBlockchain', (t) => {
   t.test('should run with genesis block', async (st) => {
     try {
       const common = new Common({ chain: 'goerli', hardfork: 'chainstart' })
-      const genesis = createGenesis({ common })
+      const genesis = Block.genesis(undefined, { common })
 
       await blockchain.putGenesis(genesis)
       st.ok(blockchain.meta.genesis, 'genesis should be set for blockchain')
@@ -74,7 +73,7 @@ tape('runBlockchain', (t) => {
       })
 
     const common = new Common({ chain: 'goerli', hardfork: 'chainstart' })
-    const genesis = createGenesis({ common })
+    const genesis = Block.genesis(undefined, { common })
     await blockchain.putGenesis(genesis)
 
     const b1 = createBlock(genesis, 1, { common })
@@ -105,14 +104,16 @@ tape('runBlockchain', (t) => {
 
 function createBlock(parent: Block | undefined, n = 0, opts = {}) {
   if (!parent) {
-    return createGenesis(opts)
+    return Block.genesis(undefined, opts)
   }
 
-  const b = new Block(undefined, opts)
-  b.header.number = toBuffer(n)
-  b.header.parentHash = parent.hash()
-  b.header.difficulty = new BN(0xfffffff).toArrayLike(Buffer)
-  b.header.stateRoot = parent.header.stateRoot
-
-  return b
+  const blockData = {
+    header: {
+      number: n,
+      parentHash: parent.hash(),
+      difficulty: new BN(0xfffffff),
+      stateRoot: parent.header.stateRoot,
+    },
+  }
+  return Block.fromBlockData(blockData, opts)
 }
diff --git a/packages/vm/tests/api/utils.ts b/packages/vm/tests/api/utils.ts
index 02c1e3802a..1549a11a07 100644
--- a/packages/vm/tests/api/utils.ts
+++ b/packages/vm/tests/api/utils.ts
@@ -1,5 +1,4 @@
 import { BN } from 'ethereumjs-util'
-import { Block, BlockOptions } from '@ethereumjs/block'
 import Account from '@ethereumjs/account'
 import Blockchain from '@ethereumjs/blockchain'
 import VM from '../../lib/index'
@@ -7,27 +6,15 @@ import { VMOpts } from '../../lib'
 
 const level = require('level-mem')
 
-export function createGenesis(opts: BlockOptions) {
-  const genesis = new Block(undefined, { ...opts, initWithGenesisHeader: true })
-  return genesis
-}
-
 export function createAccount(nonce: BN = new BN(0), balance: BN = new BN(0xfff384)) {
-  const raw = { nonce, balance }
-  const acc = new Account(raw)
-  return acc
+  return new Account({ nonce, balance })
 }
 
 export function setupVM(opts: VMOpts = {}) {
   const db = level()
-
+  const common = opts.common
   if (!opts.blockchain) {
-    opts.blockchain = new Blockchain({ db, validateBlocks: false, validatePow: false })
+    opts.blockchain = new Blockchain({ db, validateBlocks: false, validatePow: false, common })
   }
-
-  const vm = new VM(opts)
-  ;(<any>vm.blockchain)._common = vm._common
-  vm.blockchain.dbManager._common = vm._common
-
-  return vm
+  return new VM(opts)
 }
diff --git a/packages/vm/tests/config.ts b/packages/vm/tests/config.ts
index d7b48b3140..c931640103 100644
--- a/packages/vm/tests/config.ts
+++ b/packages/vm/tests/config.ts
@@ -16,8 +16,6 @@ export const SKIP_BROKEN = [
   'sha3_memSizeQuadraticCost', // SHA3: https://github.com/ethereumjs/ethereumjs-vm/pull/743#issuecomment-635116418
   'sha3_bigSize', // SHA3
 
-  'BLOCK_difficulty_GivenAsList', // Block header.ts does try very hard (via `defineProperties`) to convert any fed data into Buffers. Test should throw because difficulty is a list of Buffers, but fails to throw
-
   // these tests need "re-org" support in blockchain
   'blockChainFrontierWithLargerTDvsHomesteadBlockchain2_FrontierToHomesteadAt5',
   'blockChainFrontierWithLargerTDvsHomesteadBlockchain_FrontierToHomesteadAt5',
diff --git a/packages/vm/tests/util.ts b/packages/vm/tests/util.ts
index 81cb63cfd1..3d363c8a2e 100644
--- a/packages/vm/tests/util.ts
+++ b/packages/vm/tests/util.ts
@@ -1,23 +1,19 @@
 import * as tape from 'tape'
 import { BN, rlp, keccak256, stripHexPrefix, setLengthLeft, toBuffer } from 'ethereumjs-util'
 import Account from '@ethereumjs/account'
-import { Transaction } from '@ethereumjs/tx'
-import { Block } from '@ethereumjs/block'
+import { Transaction, TxOptions } from '@ethereumjs/tx'
+import { Block, BlockHeader, BlockOptions } from '@ethereumjs/block'
 import Common from '@ethereumjs/common'
 
 export function dumpState(state: any, cb: Function) {
   function readAccounts(state: any) {
-    return new Promise((resolve, reject) => {
+    return new Promise((resolve) => {
       let accounts: Account[] = []
       const rs = state.createReadStream()
       rs.on('data', function (data: any) {
-        let account = new Account(data.value)
-        // Commented out along TypeScript transition:
-        // Account has no property address
-        //account.address = data.key
+        const account = new Account(data.value)
         accounts.push(account)
       })
-
       rs.on('end', function () {
         resolve(accounts)
       })
@@ -91,11 +87,11 @@ const format = (exports.format = function (
 /**
  * Make a tx using JSON from tests repo
  * @param {Object} txData The tx object from tests repo
- * @param {Common} common An @ethereumjs/common object
+ * @param {TxOptions} opts Tx opts that can include an @ethereumjs/common object
  * @returns {Transaction} Transaction to be passed to VM.runTx function
  */
-export function makeTx(txData: any, common: Common) {
-  const tx = Transaction.fromTxData(txData, { common })
+export function makeTx(txData: any, opts: TxOptions = {}) {
+  const tx = Transaction.fromTxData(txData, opts)
 
   if (txData.secretKey) {
     const privKey = toBuffer(txData.secretKey)
@@ -253,31 +249,36 @@ export function verifyLogs(logs: any, testData: any, t: tape.Test) {
   }
 }
 
-export function makeBlockHeader(data: any) {
-  const header: any = {}
-  header.timestamp = format(data.currentTimestamp)
-  header.gasLimit = format(data.currentGasLimit)
-  if (data.previousHash) {
-    header.parentHash = format(data.previousHash, false, true)
+export function makeBlockHeader(data: any, opts: BlockOptions = {}) {
+  const {
+    currentTimestamp,
+    currentGasLimit,
+    previousHash,
+    currentCoinbase,
+    currentDifficulty,
+    currentNumber,
+  } = data
+  const headerData = {
+    number: currentNumber,
+    coinbase: currentCoinbase,
+    parentHash: previousHash,
+    difficulty: currentDifficulty,
+    gasLimit: currentGasLimit,
+    timestamp: currentTimestamp,
   }
-  header.coinbase = setLengthLeft(format(data.currentCoinbase, false, true), 20)
-  header.difficulty = format(data.currentDifficulty)
-  header.number = format(data.currentNumber)
-  return header
+  return BlockHeader.fromHeaderData(headerData, opts)
 }
 
 /**
  * makeBlockFromEnv - helper to create a block from the env object in tests repo
  * @param env object from tests repo
- * @param transactions transactions for the block
+ * @param transactions transactions for the block (optional)
+ * @param uncleHeaders uncle headers for the block (optional)
  * @returns the block
  */
-export function makeBlockFromEnv(env: any, transactions: Transaction[] = []): Block {
-  return new Block({
-    header: exports.makeBlockHeader(env),
-    transactions: transactions,
-    uncleHeaders: [],
-  })
+export function makeBlockFromEnv(env: any, opts: BlockOptions = {}): Block {
+  const header = makeBlockHeader(env, opts)
+  return new Block(header)
 }
 
 /**