Arcane Explosion

A disrupting wave streaks from your outstretched hand to a point you choose within range and then expands with a sharp crack into an explosion of arcane force. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d4 force damage on a failed save, or half as much damage on a successful one.

The arcane blast spreads around corners.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 2d4 for each slot level above 3rd.