Arc of Lightning (EFA - A)

Hair stands on end as you begin to cast the spell. When you finish, a bolt of lightning discharges between two nearby creatures.

A stroke of lightning 5 feet wide arcs between two creatures you can see within range. The creatures, and each creature in the line, must make a Dexterity saving throw. A creature takes 6d8 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.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.