Yo’ momma. It is a bad idea because she wouldn’t fit into the game…
Laser eye C.B.M.s that shoot lasers from your eyes at no energy cost and grant massive vision buffs.
Glass eye C.B.M.s that are indistinguishable from laser eye C.B.M.s except that they make you permanently blind and do not shoot lasers.
Swamp Ass
Whoa, dude! You haven’t been eating right. Your ass is all stank. Should hide your smell in the sewers but everywhere else you’ll be a… prime target?
Chance to procrastinate or get distracted in the middle of an action. About to impale a Z? Ooh look shiny dead. In the middle of constructing something? Stop and do something unrelated and forget about it. Middle of reloading? What’s that over there absent mindedly pour bullets on the ground.
Chance for walker virus to spontaneously mutate into a form that doesn’t require you to die before transforming you. Making you watch yourself walk around as a zombie. Forever. Or until zombie you dies, and fails to come back
Chemical imbalance does this sometimes, but very weakly.
There could be a trait that does this more often. Absent-minded, cataplectic/narcoleptic etc. that randomly drains moves, more often if you’re fighting or driving.