Thunderstroke

You call down a bolt of electricity, which unerringly strikes the target and deals 1d6 points of lightning damage. A small rumble of thunder accompanies the bolt, which is as loud as a battle (Con save or be deaf for 1 round).

This spell's damage increases by Id6 when you reach 5th leveI (2d6), 11th leveI (3d6), and 17th leveI (4d6).