Black Lightning

A dreadful bolt of lightning seeped in negative energy forming a 120 feet long and 5 feet wide line blasts out from you with a mournful wail in a direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 6d6 lightning damage and 6d6 necrotic damage on a failed save, or half as much damage on a successful one.

A humanoid killed by this spell has it's flesh incinerated and rises at the start of your next turn as a skeleton that is permanently under your command, following your verbal orders to the best of its ability.

The lightning ignites flammable objects in the area that aren't being worn or carried, and all nonmagical plants within 5 feet of the area that aren't creatures wither and die instantly.