Gishath, Sun's Avatar is a mythic Legendary Creature — Dinosaur Avatar card from Ixalan (XLN), collector number 222. Current market price: $6.61 (foil $31.82), TCGplayer market prices via Scryfall.
Vigilance, trample, haste Whenever Gishath deals combat damage to a player, reveal that many cards from the top of your library. Put any number of Dinosaur creature cards from among them onto the battlefield and the rest on the bottom of your library in a random order.