Draconic Expulsion

Inside of your sightline a 3ft radius sphere of magic emulating the draconic forces of wing and flame materializes by a singular target of your choice. Each creature in a 10-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 4d6 force damage on a failed save, or half as much damage on a successful one. The target also must take 2d10 Fire damage on a failed save. Any creature tiny or smaller on a failed save will take double damage. 

The fire spreads around corners. It ignites flammable objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d6 for Force and 1d10 for Fire for each slot level above 4th.