Krampus, Grizzly Gifter

Haste, Menace, Trample

This creatures power and toughness is equal to {x}

Whenever a player unlocks a room, you may pay {s}{s}, if you do choose one of the following:
•Deal X damage, where X is the rooms casting cost, plus {x}.
•Put X +1/+1 counters on target creature, where X is the rooms casting cost, plus {x}.
•Return X nonland permanents, who’s total cost is less than, or equal to X, where X is the rooms casting cost, plus {x}.