Discharge Dome

You create a 30-foot-radius sphere of static discharge around yourself. Each creature in the sphere when it appears must succeed on a Constitution saving throw or take 3d10 bludgeoning damage, or half damage on a save. On a failed save, a creature is considered Stunned until the end of their next turn.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d10 for each slot level above 3rd.