Bip39 Checksum. At the start you must store it Independently out of your seed. Obtaining your seed and also your passphrase in the exact same location defeats the goal of having a passphrase to start with. What constitutes a "fantastic wallet" is one which has very clear, straightforward to obtain https://bookmarkalexa.com/story4931946/bip39-mnemonic-https-linktr-ee-bip39-a-review-of-bip39-words