Deep Magic Volume 2 (p.173)
Dust and Ashes
4-level Transmutation
Casting Time: 1 action
Range/Area: 30ft.
Components: Verbal, Somatic, Material
Materials: a ball of crumbly dust
Duration: Instant
A thin green ray springs from your pointing finger to a target that you can see within range. The target can be any nonmagical physical object, to a maximum size of 10 feet on a side. If the target is held by a creature, that creature must make a Dexterity saving throw. On a failed save, the object is reduced to a pile of fine gray dust. This spell automatically and completely 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 5th level or higher, the object size increases by another 10-foot-cube for each slot level above 4th.
Available for: Wizard