[There are some people that cannot be saved. Edna is very acutely aware of that. Someone who would set up a game like this...]

People filled with that much malevolence are always driven by something. Who knows whether or not she's actually considered her own life in the scheme of things.

[That explains why there are so many.]

They must be decent, if the two of you took down so many.

[She hasn't tested it herself. It didn't sound like anything special to her at the time, so she really hadn't had any interest. With her powers, she would have been able to do that even without their stupid transformation.]