Case of the Gorgon's Kiss is a uncommon Enchantment — Case card from Murders at Karlov Manor (MKM), collector number 79†. Current market price: $0.19 (foil $0.22), TCGplayer market prices via Scryfall.
When this Case enters, destroy up to one target creature that was dealt damage this turn. To solve — Three or more creature cards were put into graveyards from anywhere this turn. (If unsolved, solve at the beginning of your end step.) Solved — This Case is a 4/4 Gorgon creature with deathtouch and lifelink in addition to its other types.