This clever loop turns Marina Vendrell's ability to lock and unlock doors into an infinite engine, supercharged by Mirror Room // Fractured Realm's static ability to double all your permanent triggers. When Marina unlocks Mirror Room, the Fractured Realm half ensures you get a double dose of triggers, flooding the board with two token copies of North Pole Patrol instead of just one. From there, the two fresh North Pole Patrol tokens use their tapping ability to untap Marina, while Marina continuously toggles the Room's locks to reset the cycle. Meanwhile, Yarus, Roar of the Old Gods sits safely on the sidelines granting haste, ensuring the freshly generated tokens and any other pieces are ready for action.