Seed XOR (optional)
Using the Seed XOR function in your Coldcard allows you to separate your original seed phrase into two parts, each looking like it’s own 24-word seed phrase. Combining them will produce your original 24-word seed phrase.
Each Seed XOR component can also function as a Bitcoin seed phrase. You can keep some funds on it to satisfy a potential attacker or to alert you that your storage is compromised if someone finds it and takes the funds held on it.