Razaketh, the Foulblooded is a mythic Legendary Creature — Demon card from Hour of Devastation Promos (PHOU), collector number 73s. Current market price: — (foil $41.95), TCGplayer market prices via Scryfall.
Flying, trample Pay 2 life, Sacrifice another creature: Search your library for a card, put that card into your hand, then shuffle.