Invalid Bip39 Phrase Storing entropy (including keeping a deck of playing cards in a selected shuffled order) is unreliable as compared to storing a mnemonic. In place of storing entropy, store the mnemonic created through the entropy. Steganography may very well be useful when storing the mnemonic. You can see https://royalbookmarking.com/story18991265/seed-phrase-example-an-unbiased-view-of-seed-phrase-generator