Crosis, the Purger is a rare Legendary Creature — Dragon card from Premium Deck Series: Graveborn (PD3), collector number 5. Current market price: — (foil $0.80), TCGplayer market prices via Scryfall.
Flying Whenever Crosis deals combat damage to a player, you may pay {2}{B}. If you do, choose a color, then that player reveals their hand and discards all cards of that color.