Devastate Undead

You destroy an undead and turn the remnants of energy left in the undead animation into life-force to feed your physical form.

You touch an undead creature. The undead creature must make a Charisma saving throw, on a success, the spell has no effect on the creature. Friendly undead creatures with an intelligence of 8 or lower fail this saving throw automatically. Hostile Undead creatures have advantage on this saving throw. If the undead creature fails its saving throw, roll 5d10. If the undead creature’s current hit point total is equal to or lower than your roll, it is destroyed and you regain the same number of hit points as the creature had left.

At higher levels: When you cast this spell using a spell slot of 4th level or higher, roll an additional 2d10 for each slot level above 3rd.