Canon's Balls of Fire

A bright streak flashes from your pointing finger to a point you choose within range and then blossoms with a loud bang into several explosions of colorful flame at points you choose within 30-feet of the initial target. Each creature in a 10-foot-radius sphere centered on those points must make a Dexterity saving throw. A target takes 6d6 fire damage on a failed save, or half as much damage on a successful one.

The fires spread around corners. It ignites flammable objects in the areas that aren't being worn or carried.

Eye protection is highly recommended.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 and the maximum distance from the initial point increases by 10-feet for each slot level above 3rd