Anguished Unmaking

You begin to disassemble a construct or undead at the molecular level. The creature must succeed on a constitution saving throw or take 10d6 force damage and be stunned until the end of your next turn or half as much damage on a successful one. As an additional cost to cast this spell, roll 3 of your hit dice, you take force damage equal to the result. Creatures that were originally created by you have disadvantage on this save and take twice as much damage.

At higher levels. When you cast this spell with a spell slot of 5th-level or higher, the damage increases by 2d6 for each slot level above 4th.