I only mentioned that in Aya's post because I didn't feel like inventing one or finding one. I figured the nightmare scenario would work great since when she does have nightmares, it's of all the killing she did. Seeing as she killed with her power usually, I figured it go out of control. So there would be some mutants immune to it, but the constant miniature electrical storm might be a bit of a problem. It was an asspull, basically.