Wavecrash Triton is a common Creature — Merfolk Wizard card from Theros (THS), collector number 74. Current market price: $0.12 (foil $0.48), TCGplayer market prices via Scryfall.
Heroic — Whenever you cast a spell that targets this creature, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.