Bombard

A barrage of fiery projectiles begins falling in the shape of a cylinder that is 30 feet tall with a 15-foot-radius centered on a point within range. A creature that starts its turn there must make a Dexterity saving throw. On a failed save, a creature takes 4d10 fire damage and is knocked prone. On a successful save, a creature takes only half the damage and is not knocked prone.

As a bonus action on your turn, you can move the sphere up to 20 feet.

At Highter Levels. When you cast this spell using a spell slot of 7th level or higher, the damage increases by 1d10 for each slot level above 6th.