Cataclsym

The Earth shakes, fire erupts from the ground, and the stars begin to fall from the sky. Each creature in a 200-foot-radius sphere centered on each point you choose must make a Dexterity saving throw. The sphere spreads around corners. A creature takes 10d6 fire damage and 20d8 bludgeoning damage on a failed save, or half as much damage on a successful one. Each creature in the area must make a strength saving through or be knocked prone

This does double damage to all structures

The spell damages objects in the area and ignites flammable objects that aren't being worn or carried.