Mania levels.

[that doesn't help, but since everyone she's mentioned Mania to has been confused, she does elaborate after an awkwardly long pause.]

It's a sort of... energy or substance that can cause physical and mental change. Ish has said that I shouldn't be able to contaminate anyone else, however...

[that's the most simplified, barebones explanation but it's not like we need to get into the nitty gritty.]