You hurl a small bolt of lightning at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 fire damage. On a roll of 20, the lightning jumps to a second target within 10 feet who will take half of the damage applied to the first target.

This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).