The next time you make a ranged weapon attack before the spell ends (Concentration, 1 min), the attack deals lightning instead of its normal type. On a hit, the target takes 4d8 Lightning damage and each creature within 10 feet must make a DEX save or take 2d8 Lightning damage (half on success). Higher Slot: +1d8 primary and +1d8 secondary per slot level above 3.