In lieu of storing entropy, keep the mnemonic created with the entropy. Steganography can be useful when storing the mnemonic. The random mnemonic generator on this page uses a cryptographically safe random number generator. The built-in random generator can typically be reliable more than your very own instinct about randomness. https://sociallytraffic.com/story3934928/helping-the-others-realize-the-advantages-of-bip39-seed-phrase-mnemonics-generator