Bip39. Have the needed quantity of COLDCARDs, choose Import Current throughout setup and load the exact same backup file onto Every single of them. Give Just about every COLDCARD its own passphrase and afterwards lock down the seed. Your seed words will not be recognized to any on the devices https://travialist.com/story9754043/bip39-https-linktr-ee-bip39-the-fact-about-bip39-words-that-no-one-is-suggesting