Diluvian Primordial is a rare Creature — Avatar card from The List (PLST), collector number GTC-33. Current market price: $0.51, TCGplayer market prices via Scryfall.
Flying When this creature enters, for each opponent, you may cast up to one target instant or sorcery card from that player's graveyard without paying its mana cost. If a spell cast this way would be put into a graveyard, exile it instead.