Electric Arc (5.5e Patch)

You shoot a jolt of lightning at a creature you can see within range. Make a ranged spell attack against the target. On hit, the target takes 1d6 Lightning damage, and an arc of lightning jumps from the target to another creature within 10 feet, dealing 1d6 Lightning damage to the second creature.

Cantrip Upgrade. All of the damage increases when you reach level 5 (2d6), 11 (3d6), and 17 (4d6)