Anna's Obliterating Touch

Your hands become covered in a gleaming starry darkness, resembling the night sky. This darkness extends down to your elbows, slowly becoming thinner and paler.

As a bonus action on each of your turns, you can touch a creature or object to attempt to disintegrate it. Make a melee spell attack against it, dealing 10d6 + 40 force damage on a hit. 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 cloud of fine gleaming white 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.

When you hit a creature with a ranged spell attack or it fails a saving throw against any of your spells, you can end this spell as a bonus action to make a ranged spell attack against it, dealing 10d6 + 40 force damage on a hit. If this damage reduces the target to 0 Hit Points, it is disintegrated.

At Higher Levels: When you cast this spell using a 9th level spell slot, its duration is increased to 10 minutes.