For the next minute, you have near perfect control over an artillery battery within range of the spell. As an action on each of your turns during this spell, you may choose another point within range of the spell. Each creature within a 20-foot radius circle centered on that point must make a Dexterity saving throw or take 4d8 fire damage and 4d8 bludgeoning damage as you magically fire a salvo from the weapons in the battery. On a successful save, a creature takes half as much damage.