This spell only effects creatures chosen by the caster. A bright streak flashes from your pointing finger to a point you choose within range and then blossoms with a low roar into an explosion of dull light . Each chosen creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. Each targeted creature takes 8d6 force damage on a failed save, or half as much damage on a successful one.
The force damage spreads around corners. It shatters fragile 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. Radius of the blast increases by 15 feet at 5th level, 7th level, and 9th level.
* - (A Wand/Rod/Staff Arcane Focus)