Critical Mass

An electric blue aura springs from your pointing finger to a target that you can see within range. The target can be a creature, an object, or a creation of magical force, such as the wall created by wall of force.

A creature targeted by this spell must make a Constitution saving throw. On a failed save, the target takes 20d6 + 40 psychic damage and radiant damage equal to your total hit points The target is disintegrated if this damage leaves it with 0 hit points. The caster loses all remaining hit points and dies.

A disintegrated creature and everything it is wearing and carrying, except magic items, are reduced to a pile of fine gray dust. The creature can not be restored and neither can the caster.