Deep Purifier's Annihilating Ball

Each creature in a 5-foot Sphere centered on a point you can see within range makes a Dexterity saving throw. On a failed save, a target takes 10d8 Necrotic damage plus 10d8 Force damage. A creature reduced to 0 Hit Points by this spell, other than the Deep Purifier, is slain instantly, is absorbed into the sphere, and leaves behind no remains, not even magic items. Artifacts vanish instead to a random location on a random plane. On a successful save, a creature takes half damage. After the damage is dealt, the sphere vanishes,