Bip39 Mnemonic. First and foremost you'll want to keep it SEPARATELY out of your seed. Having your seed plus your passphrase in precisely the same spot defeats the purpose of aquiring a passphrase in the first place. Through the use of a passphrase, you add an extra layer of stability https://get-social-now.com/story4293943/bip39-passphrase-https-linktr-ee-bip39-bip39-wallet-can-be-fun-for-anyone