Electrodominance

A stroke of lightning forming a line 100 feet long and 5 feet wide blasts out from you in a direction you choose. Each creature in the line must make a Dexterity saving throw. A creature takes 8d6 lightning damage on a failed save, or half as much damage on a successful one. The lightning ignites flammable objects in the area that aren’t being worn or carried.

After a successful cast of Electrodominance, you may use your bonus action to cast any spell you know of lower level than your casting of Electrodominance. The spell must have a casgting time of 1 action, 1 bonus action, or a reaction. You must have a spell slot of the appropriate level available, and that casting consumes that spell slot. You cannot use this bonus action to cast a spell greater than 5th level, regardless of the level Electrodominance was cast at.