Charged Reprisal

Your body sparks, and the creature that damaged you is suddenly struck with 300 million volts of electricity. The creature must make a Dexterity saving throw. It takes 2d10 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 1d10 for each slot level above 1st.