Atomic Bomb

A blazing orb of glowing emerald metal plummets to the ground at a point you can see within range. Each creature in a 40-foot-radius sphere centered on that point you choose must make a Constitution saving throw. The sphere spreads around corners. A creature takes 14d6 necrotic damage, 14d6 poison damage and 14d6 radiant damage on a failed save and is stunned, or half as much damage on a successful one and not be stunned. A creature subjected to this effect is poisoned for a week. All nonmagical normal vegetation within this radius disintegrates. Any creature who dies from this spell disintegrates. Any building or construction destroyed by this spell disintegrates.

The spell deals double damage to buildings and constructions.