Wiznak's Static Discharge

Build up a charge of electricity, and then discharge it at a target. Make a ranged attack against a target. On hit the target takes 1D10 Lightning damage. If this is cast on a metal or water, anything touching it within 30 ft of the contact point, take 1D6 Lightning Damage.

The Spell's damage increases by 1D10 when you reach 5th level (2D10), 11th level (3D10), and 17th level (4D10)