Electroball

A bright streak flashes from your pointing finger to a point you choose within range and then strikes as a series of deadly Tesla coil arcs. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 lightning damage on a failed save, or half as much damage on a successful one.

The electricity spreads around corners. It charges metal objects in the area that aren't being worn or carried. If such item is touched afterwards, the creature must make a Dexterity saving throw against your Spell Save DC, taking 1d6 lightning 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.