The Spirits' Mockery

You call upon the spiteful spirits bound to your curse, compelling them to disrupt another creature's magic with a chorus of spectral laughter.

The creature must make a saving throw using its spellcasting ability against your spell save DC. On a failed save, the creature takes 2d6 psychic damage, and its speed is reduced to 0 until the start of its next turn as spectral hands claw at its shadow. On a successful save, it takes half as much damage and suffers no movement reduction.

If the creature is concentrating on a spell, the damage can trigger a concentration saving throw as normal.