Ancient Brass Dragon is a mythic Creature — Elder Dragon card from Battle for Baldur's Gate Promos (PCLB), collector number 111s. Current market price: — (foil $59.99), TCGplayer market prices via Scryfall.
Flying Whenever this creature deals combat damage to a player, roll a d20. When you do, put any number of target creature cards with total mana value X or less from graveyards onto the battlefield under your control, where X is the result.