Trs
Lightning Arrow
3rd-level Transmutation · XPHB, p. 292
Casting Time1 bonus (which you take immediately after hitting or missing a target with a ranged attack using a weapon)
RangeSelf
ComponentsV, S
DurationInstantaneous
Saving Throwdexterity
Damage Typelightning
Description
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 4d8 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 2d8 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
Using a Higher-Level Spell Slot: The damage for both effects of the spell increases by 4d8;2d8 for each spell slot level above 3.