Excruciating Deformation

Your hand is engulfed in an oily glimmer. Make a melee spell attack to touch a creature. If you hit, the creature’s body will begin to warp and become malformed. Its arms and legs twist in on themselves and its body contorts in disturbing, anatomically impossible, and very painful ways.

The creature is paralyzed and at the beginning of each of its turns it takes 5d6 damage. At the end of each of its turns, the target can make a Constitution saving throw. On a success, the spell ends on the target.

If the damage taken by this spell would reduce the target to 0 hit points, it instead drops to 1 hit point and falls unconscious. When the spell ends, the creature returns to its normal shape.