Atrophy

You target a creature within range and turn their own essence against them. The target must make a Constitution saving throw. On a failed save, they suffer damage equal to a roll of their largest hit die. Damage dealt by this spell ignores resistances and immunities.

This spell's damage increases by 1 hit die when you reach 5th level (2 hit die), 11th level (3 hit die), and 17th level (4 hit die).