Electric Rain

A storm made up of sheets of raging electricity appears in a location you choose within range. The area of the storm consists of up to ten 10-foot cubes, which you can arrange as you wish. Each cube must have at least one face adjacent to the face of another cube. Each creature in the area must make a Dexterity saving throw. It takes 7d10 lightning damage on a failed save, or half as much damage on a successful one.

At Higher Levels: When you cast the spell using a spell slot of 8th level or higher, you can create one extra 10-foot cube for each slot level above 8th.