Keepsake Gorgon is a uncommon Creature — Gorgon card from Theros (THS), collector number 93. Current market price: $0.18 (foil $0.19), TCGplayer market prices via Scryfall.
Deathtouch {5}{B}{B}: Monstrosity 1. (If this creature isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.) When this creature becomes monstrous, destroy target non-Gorgon creature an opponent controls.