Bonehoard Dracosaur is a mythic Creature — Dinosaur Dragon card from The Lost Caverns of Ixalan Promos (PLCI), collector number 134p. Current market price: $26.34 (foil $14.80), TCGplayer market prices via Scryfall.
Flying, first strike At the beginning of your upkeep, exile the top two cards of your library. You may play them this turn. If you exiled a land card this way, create a 3/1 red Dinosaur creature token. If you exiled a nonland card this way, create a Treasure token.