As an alternative to storing entropy, keep the mnemonic created with the entropy. Steganography might be advantageous when storing the mnemonic. The random mnemonic generator on this site utilizes a cryptographically secure random range generator. The inbuilt random generator can commonly be trusted over your own personal instinct about randomness. https://peakbookmarks.com/story19111427/the-5-second-trick-for-ledger-seed-phrase-bip39