Smaug, Wicked Worm is a rare Legendary Creature — Dragon card from The Hobbit (HOB), collector number 164. Current market price: $1.38 (foil $1.74), TCGplayer market prices via Scryfall.
Flying When Smaug enters, create X tapped Treasure tokens, where X is the number of artifacts your opponents control. Whenever you cast a spell, if mana from a Treasure was spent to cast it, you draw a card and lose 1 life.