So you know how Superman is Superman, but he's basically allergic to kryptonite?
That's like his negative to his super power/s.
What superpower would have what negatives?
I think for invisibility it should have a negative like "You're completely invisible, except under a blue light," or "You're invisible, but what you ate recently (If not fully digested yet) isn't."
Negatives are brilliant because they can be logical or just plain right random, like, "You can talk to animals, but bees hate you, relentlessly."