Carnage Wurm is a uncommon Creature — Wurm card from Magic 2012 (M12), collector number 168. Current market price: $0.15 (foil $0.63), TCGplayer market prices via Scryfall.
Bloodthirst 3 (If an opponent was dealt damage this turn, this creature enters with three +1/+1 counters on it.) Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)