Hythonia the Cruel is a mythic Legendary Creature — Gorgon card from Theros (THS), collector number 91. Current market price: $0.41 (foil $2.06), TCGplayer market prices via Scryfall.
Deathtouch {6}{B}{B}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) When Hythonia becomes monstrous, destroy all non-Gorgon creatures.