Synaptic Static

V, S; 1 action
Each creature in a 20-foot-radius sphere within
120 ft. takes 8d6 psychic damage (Intelligence
saving throw halves). After a failed save, a target
takes -1d6 on all attack rolls, ability checks, and
concentration checks. The target can make a new
saving throw at the end of each of its turns,
ending the effect on itself on a success.