Electric Bolt

You shoot a spark of lightning at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d6 lightning damage. On a hit the bolt can curve to another target within 10 feet. The second target must make a Dexterity saving throw or take 1d6 damage.

Both damage rolls increase by 1d6 at 5th level (2d6 and 2d6), 11th level (3d6 and 3d6) and 17th level (4d6 and 4d6).