Discharge

A wave of electric charge shoots out from you. Each creature in a 15-foot cube originating from you must make a Constitution saving throw. On a failed save, a creature takes 2d8 lightning damage and is paralyzed. On a successful save, the creature takes half as much damage and isn't paralyzed.

In addition, any flammable object within 10 feet of you will be ignited. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.