Bip39 Mnemonic. Entropy values has to be sourced from a robust source of randomness. This implies flipping a fair coin, rolling a fair dice, noise measurements etc. Will not use phrases from textbooks, lyrics from tracks, your birthday or steet tackle, keyboard mashing, or everything you think that is random, https://phase2directory.com/listings13050124/bip39-mnemonic-generator-https-linktr-ee-bip39-bip39-github-no-further-a-mystery