Black Flame Lightning

Black Flame Lightning. Ranged Spell Attack: reach 100 ft. 5 ft wide, any creature in line. Hit: 27 (3d8 fire + 3d6 lightning) damage. A bolt of crackling lightning and Black Flame combine to form a line of devastation, 100 feet long and 5 feet wide, blasting out from you in a direction you choose.

Each creature in the line must make a Dexterity saving throw. A creature takes 3d6 lightning damage, plus 3d8 fire damage on a failed save, or half as much damage on a successful one. Creatures that failed the Dexterity save, must also succeed on a DC 14 Constitution saving throw. If the target fails, the Black Flame sucks one (1) level from it. This level de-buff can be regained, after taking a long rest.

The Black Flame Lightning ignites flammable objects in the area that aren't being worn or carried.

If Black Flame Lightning sucks the last level from a creature, that creature is Incapacitated until it completes a long rest.

At Higher Levels: This spell increases both the lightning damage and the fire damage (essentially doubling the overall damage), if cast at 5th level or above.