This haunted trap affects a 20-foot-radius sphere centered on an ancient but pristine instrument. When a creature enters the area, the trap’s emanation manifests as the sound of distant, mournful music. A round later, a phantom performer appears and begins playing the instrument for the next minute. While the performer plays, any creature that enters or starts its turn in the haunted trap’s area must succeed on a Wisdom saving throw or float 20 feet into the air and be affected by the spell Otto’s irresistible dance. There they are joined by illusory dancers as they dance for the remainder of the performer’s song.