Craterhoof Behemoth is a mythic Creature — Beast card from Tarkir: Dragonstorm Promos (PTDM), collector number 138p. Current market price: $25.29 (foil $24.48), TCGplayer market prices via Scryfall.
Haste When this creature enters, creatures you control gain trample and get +X/+X until end of turn, where X is the number of creatures you control.