Deathbringer Thoctar is a rare Creature — Zombie Beast card from Alara Reborn (ARB), collector number 36. Current market price: $0.69 (foil $1.01), TCGplayer market prices via Scryfall.
Whenever another creature dies, you may put a +1/+1 counter on this creature. Remove a +1/+1 counter from this creature: It deals 1 damage to any target.