Akavon's Oblivion

The heavens open and unleash oblivion. Each creature in a 60-foot-radius 200-foot-high cylinder centred on a point within range must make a Constitution saving throw. The area ignores buildings or any kind of shelter, such as hiding in a cave. A creature takes 20d6 force damage and 30d6 damage that you choose between cold, fire, lightning, thunder, necrotic, psychic or radiant on a failed save, or half as much damage on a successful one.

Creatures are disintegrated if the damage reduces them to 0 hit points.

The spell immediately disintegrates any non magical wooden objects or a creation of magical force such as a wall of force. A magic item is unaffected by this spell.