PHB, page 233

Disintegrate

6-level Transmutation

A thin green ray 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 Dexterity saving throw. On a failed save, the target takes 10d6+40 force damage. If this damage reduces the target to 0 hit points, it is disintegrated.

  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 be restored to life only by means of a true resurrection or a wish spell.

  This spell automatically disintegrates a Large or smaller nonmagical object or a creation of magical force. If the target is a Huge or larger object or creation of force, this spell disintegrates a 10-foot-cube portion of it. A magic item is unaffected by this spell.
 
 
At higher levels: When you cast this spell using a spell slot of 7th level or higher, the damage increases by 3d6 for each slot level above 6th.