Electric firing

They form small rays in great quantity in the palms of the hand and leave you in the direction that you choose. Each creature on the line must make a Dexterity saving throw. A creature takes 8d6 electrical damage on a failed resistance or half the damage on a successful resistance.
The lightning strikes flammable objects in the area that are not being used or loaded.

 At higher levels. When you cast this spell using a 4th level or higher magic slot, the damage increases by 1d8 for each slot level above the 1st level.