Waker of Waves is a uncommon Creature — Whale card from The List (PLST), collector number M21-84. Current market price: $0.15, TCGplayer market prices via Scryfall.
Creatures your opponents control get -1/-0. {1}{U}, Discard this card: Look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.