Cannons of Heaven

A cloud in the shape of a 30-foot sphere appears in the ky anyhere from 50 to 100 feet above you at a point you choose. The spell fails if you cann't see a point in the air where the cloud could appear (for example, if you are in a room that can't accommodate the cloud). Multiple metal cannons project out of the cloud, like a well-armed ship.

When you cast the spell, choose a 10-foot-radius area you can see within range. The cannons fire upon that area. Each creature in the area must make a Dexterity saving throw. A creature takes 3d10 bludgeoning damage on a failed save, or half as much on a success. On each of you turns until the spell ends, you can use your action to call down another barrage of cannonballs in this wayagain, targeting the same area or a different one.

The cloud and cannons cannot be attacked, but can be dispelled.

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d10 for each slot level above 3rd.