Jack Vessalius, after so many years of waiting, finally managed to complete his dream and drag the world down to the abyss.
But it did not go entirely as planned.
In an event which came to be known as the Reset, the abyss struggled to hold the entirety of the world within its confines, and had a reaction unlike that of the body fending off an infection. Unable to handle such a huge stress, the Will of the Abyss completely ejected everything in the abyss back into the upper dimension, without regard for whether or not it belonged in there or not. The world was returned to its original state, but those who had died had come back to life. The natural order of things was upset by this sudden change, but aside from the return of figures who had long since died, nothing else seemed to have altered.