Dragon Breath Bomb

 You touch one willing creature and imbue it with the power to spew magical energy from its mouth, provided it has one. Choose acid, cold, fire, lightning, or poison. channeling all of the magic in into a single breath attack you release a large ball of energy. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 of the chosen type on a failed save, or half as much damage on a successful one.

The energy spreads around corners. It appropriately effects objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.