Electric Surge

After rubbing them together you thrust your hands forward with fingers spread, as a multitude of electric arcs fan out in front of you. Each creature in a 15-foot cone must make a Dexterity saving throw. A creature takes 3d6 lightning damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.