Eldritch Evolution is a rare Sorcery card from Eldritch Moon Promos (PEMN), collector number 155s. Current market price: — (foil $12.28), TCGplayer market prices via Scryfall.
As an additional cost to cast this spell, sacrifice a creature. Search your library for a creature card with mana value X or less, where X is 2 plus the sacrificed creature's mana value. Put that card onto the battlefield, then shuffle. Exile Eldritch Evolution.