Voracious Dragon is a rare Creature — Dragon card from Duel Decks: Knights vs. Dragons (DDG), collector number 56. Current market price: $0.52, TCGplayer market prices via Scryfall.
Flying Devour 1 (As this creature enters, you may sacrifice any number of creatures. It enters with that many +1/+1 counters on it.) When this creature enters, it deals damage to any target equal to twice the number of Goblins it devoured.