Bip39 Ian Coleman. Entropy values needs to be sourced from a powerful source of randomness. This implies flipping a fair coin, rolling a fair dice, sounds measurements etcetera. Will not use phrases from publications, lyrics from tunes, your birthday or steet tackle, keyboard mashing, or anything you think is random, https://worlds-directory.com/listings13201537/bip39-seed-generator-https-linktr-ee-bip39-bip39-passphrase-generator-fundamentals-explained