Bip39 Seed. First of all you need to retail store it SEPARATELY from a seed. Getting your seed and also your passphrase in the identical area defeats the objective of possessing a passphrase to start with. BIP39 specifies a list of 2048 words from which the mnemonic phrase is preferred. https://bookmarkja.com/story20833662/bip39-https-linktr-ee-bip39-a-simple-key-for-bip39-unveiled