Bip39-Standalone. You'd probably then do a standard recovery that has a command much like the 1 below. (This command takes advantage of a sample wallet file bunlded with BTCRecover) Anybody else who discovers the phrase can steal the bitcoins. It should be saved top secret, by way of example it https://listfav.com/story20291938/bip39-list-https-linktr-ee-bip39-the-single-best-strategy-to-use-for-bip39-wallets