Worldgorger Dragon is a mythic Creature — Nightmare Dragon card from Dominaria Remastered (DMR), collector number 334. Current market price: $1.41 (foil $2.27), TCGplayer market prices via Scryfall.
Flying, trample When this creature enters, exile all other permanents you control. When this creature leaves the battlefield, return the exiled cards to the battlefield under their owners' control.