Possessed Goat is a common Creature — Goat card from Duskmourn: House of Horror (DSK), collector number 25. Current market price: $0.15 (foil $0.19), TCGplayer market prices via Scryfall.
{3}, Discard a card: Put three +1/+1 counters on this creature and it becomes a black Demon in addition to its other colors and types. Activate only once.