Putting strictly other because it will literally be all around Equestria.

We don't know when it started.
We don't know when it happened.
All we know is that Twilight came home with it on her face.

That... cross on her face. That's what everyone else has.
But not me.
Here I am, locked away in a ward for the mentally unstable, and everyone else is out there eating each other.
Yeah, clean bill of health right there...

Crossed crossover. For those are familiar, you know what to expect, for those that aren't... Read this.