Chorus of the Tides is a common Creature — Siren card from Born of the Gods (BNG), collector number 33. Current market price: $0.07 (foil $0.15), TCGplayer market prices via Scryfall.
Flying Heroic — Whenever you cast a spell that targets this creature, scry 1. (To scry 1, look at the top card of your library, then you may put that card on the bottom.)