Waker of Waves is a uncommon Creature — Whale card from Core Set 2021 (M21), collector number 84. Current market price: $0.32 (foil $0.80), 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.