Sirens

Sirens are a kind of beautiful harpy with humanlike bodies, bird wings and legs, and bright plumage in shades of blue, purple, and green. They use the stat block of the harpy in the Monster Manual, using their luring song to mesmerize their prey and draw it near. Siren songs prove exceptionally dangerous to sailors, who risk steering their ships onto reefs in an attempt to reach the source of the melody.