Dromar, the Banisher is a rare Legendary Creature — Dragon card from Invasion (INV), collector number 244. Current market price: $3.14 (foil $103.67), TCGplayer market prices via Scryfall.
Flying Whenever Dromar deals combat damage to a player, you may pay {2}{U}. If you do, choose a color, then return all creatures of that color to their owners' hands.