Bip39 Vs Slip39. Firstly you should retailer it SEPARATELY from the seed. Acquiring your seed and also your passphrase in the same locale defeats the purpose of getting a passphrase in the first place. Entropy is an advanced attribute. Your mnemonic might be insecure if this attribute is utilised improperly. https://mediajx.com/story21924595/bip-39-https-linktr-ee-bip39-getting-my-bip39-wallets-to-work