Priest of the Wakening Sun is a rare Creature — Human Cleric card from Ixalan (XLN), collector number 27. Current market price: $0.27 (foil $0.47), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, you may reveal a Dinosaur card from your hand. If you do, you gain 2 life. {3}{W}{W}, Sacrifice this creature: Search your library for a Dinosaur card, reveal it, put it into your hand, then shuffle.