Arcane Blast

A purple ball of light flashes from a point you choose within range and then bursts into an explosion of arcane force. Each creature in a 15-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 9d6 force damage on a failed save, or half as much damage on a successful one.

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.