Kopala, Warden of Waves is a rare Legendary Creature — Merfolk Wizard card from Ixalan Promos (PXLN), collector number 61s. Current market price: — (foil $3.67), TCGplayer market prices via Scryfall.
Spells your opponents cast that target a Merfolk you control cost {2} more to cast. Abilities your opponents activate that target a Merfolk you control cost {2} more to activate.