Arcing Lightning

You hurl a bolt of lightning at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 lightning damage. You can then make another ranged spell attack against another creature or object within 10 feet of the initial target. On a hit, the target takes 1d8 lightning damage.

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).