Bip39 Seed. The passphrase will not be selected from the predefined list of 2048 words – it may be any word or phrase you decide on. What constitutes a "very good wallet" is one that has apparent, simple to access documentation on supported BIP standards, derivation paths, and recovery procedures. https://thekiwisocial.com/story5126677/bip39-wallets-https-linktr-ee-bip39-the-bip39-wallet-diaries