Tilu's Volt Eruption

A bright spark flashes from your pointing finger to a point you choose within range and then blossoms with a loud crackle into an explosion of lightning. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw, creatures in the air have advantage to make this save. A target takes 9d6 lightning damage on a failed save, or half as much damage on a successful one. If the target fails by 5 or more, the target is stunned until the end of their next turn.

The lightning arcs around corners. If the spell is cast on water, the effective range of the spell increases to a 50-foot-radius on the water's surface.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d6 for each slot level above 4th.