Opportunistic Dragon is a rare Creature — Dragon card from Throne of Eldraine (ELD), collector number 364. Current market price: $0.44 (foil $1.77), TCGplayer market prices via Scryfall.
Flying When this creature enters, choose target Human or artifact an opponent controls. For as long as this creature remains on the battlefield, gain control of that permanent, it loses all abilities, and it can't attack or block.