You release a blast of shocking energy around you.
Creatures within 10 feet of you make a constitution saving throw. On a failed save they take 6d6 lightning damage and cant take reactions until the end of there next turn. On a success they take half damage and can take reactions as normal.

higher level slots: for every 2 levels above 3rd the damage increases by 2d6 and the range around you increases by 5 feet