Conductive Arc

you grab the person who struck you in melee and release arcs of lightning in retaliation. the creature must make a dexterity save.  It takes 2d10 lightning damage on a failed save and is pushed away 10 ft, or half as much damage on a successful one and is not pushed away.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.