Dromoka, the Eternal is a rare Legendary Creature — Dragon card from Fate Reforged Promos (PFRF), collector number 151s. Current market price: — (foil $3.69), TCGplayer market prices via Scryfall.
Flying Whenever a Dragon you control attacks, bolster 2. (Choose a creature with the least toughness among creatures you control and put two +1/+1 counters on it.)