Razaketh, the Foulblooded is a mythic Legendary Creature — Demon card from Secret Lair Drop (SLD), collector number 163. Current market price: $18.37 (foil $20.92), 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.