Brenatto's Voltaic Bolt

You touch one piece of ammunition and charge it with crackling electrical energy.

The first time the ammunition is used to make a ranged attack before the spell ends, the spell ends immediately after the attack. On a hit, the attack deals an additional 3d6 Lightning damage to its target. On a miss, the stored energy disperses harmlessly.

The spell also ends if the ammunition is destroyed.

Using a Higher-Level Spell Slot. The additional damage increases by 1d6 for each spell slot level above 2.