Bip39 Mnemonic Seed Phrase Generator 1 illustration of manually creating entropy would be flipping a coin. But if an attacker will give you a coin that is weighted a little in favor of heads, your initial source of entropy will have been corrupted. Constantly download / buy wallets from official https://bookmarkgenius.com/story18440500/old-seed-phrase-generator-an-unbiased-view-of-seed-phrase-generator