Lightning Arrow
3rd-level transmutation
Casting Time 1 bonus action, which you take immediately after hitting or missing a target with a ranged attack using a weapon
Range Self
Components V, S
Duration Instantaneous
As your attack hits or misses the target, the weapon or ammunition you're using transforms into a lightning bolt. Instead of taking any damage or other effects from the attack, the target takes Lightning damage on a hit or half as much damage on a miss. Each creature within 10 feet of the target then makes a Dexterity saving throw, taking Lightning damage on a failed save or half as much damage on a successful one.
The weapon or ammunition then returns to its normal form.
At Higher Levels. The damage for both effects of the spell increases by for each spell slot level above 3.