Ghalta, Stampede Tyrant is a mythic Legendary Creature — Elder Dinosaur card from The Lost Caverns of Ixalan Promos (PLCI), collector number 185p. Current market price: $30.04 (foil $31.06), TCGplayer market prices via Scryfall.
Trample When Ghalta enters, put any number of creature cards from your hand onto the battlefield.