User blog comment:IamJakuhoRaikoben/Chapter 410: Memento Mori, Review./@comment-4449950-20141123060745/@comment-7418318-20141123143942

I've started to think that Lumen Histoire will absorb the effects of both Face and Memeonto Mori into itself. This will save everyone else, but at the cost of Mavis leaving this world for good.

It might also result in Kyouka not dying after all, but I'm not sure whether that'd be a good or a bad thing.