Circuit Breaker

You unleash a burst of electricity in a 5-foot Emanation originating from yourself. Each creature in the Emanation makes a Dexterity saving throw, taking 3d8 Lightning damage on a failed save or half as much damage on a successful one. Magical Technology within the Emanation, except for objects being worn or carried by you, is disabled until the end of your next turn. 

At higher levels The damage increases by 1d8 for each spell slot level above 2.