Dreamcaller Siren is a rare Creature — Siren Pirate card from Ixalan (XLN), collector number 54. Current market price: $0.29 (foil $0.43), TCGplayer market prices via Scryfall.
Flash Flying This creature can block only creatures with flying. When this creature enters, if you control another Pirate, tap up to two target nonland permanents.