Master of Waves is a mythic Creature — Merfolk Wizard card from Duel Decks: Merfolk vs. Goblins (DDT), collector number 1. Current market price: — (foil $0.45), TCGplayer market prices via Scryfall.
Protection from red Elemental creatures you control get +1/+1. When this creature enters, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)