Thy Flesh Consumed

Choose a creature within range. The target is consumed with an irrational hunger for its own flesh. At the start of each of its turns for the duration, the target must attempt a Wisdom saving throw. On a success, the effect ends. On a failure, the target must spend its action to devour itself, dealing 3d6 damage.

At Higher Levels: When cast using a 5th level spell slot or higher, target one additional creature for every level above 4th.