Balled Lightning

You create a small ball of energy that you roll to a target you can see within range. Make a ranged spell attack against the creature. On hit the creature takes 1d8 lightning damge. The damage increases by 1d8 for every 10 feet the ball of lightning moves.

When the ball passes through a creatures space that creature must make a Dexterity saving throw. On a failed save the creature takes 2d6 lightning damage.