Shipwreck Singer is a uncommon Creature — Siren card from Conspiracy: Take the Crown (CN2), collector number 206. Current market price: $0.06 (foil $0.25), TCGplayer market prices via Scryfall.
Flying {1}{U}: Target creature an opponent controls attacks this turn if able. {1}{B}, {T}: Attacking creatures get -1/-1 until end of turn.