Neo traveled to the Stump of the World Tree. It was the center of the world.
He found a hollow cavity inside the tree. Inside was not a treasure. It was a Record.
The Ember of Hope had left a message before it died. It wasn't written in words. It was written in Will.
Neo touched the stump. The memories flooded him. He saw Noax in the fog. He saw Ren in the river. He saw Kuro in the dust.
He heard the Ember's final thought: "I tried to fix it. I failed. The flaw is not in the gods. The flaw is in the Fog. As long as the Grey Fog surrounds the world, Solitude will enter, and Solitude breeds Madness."
Neo pulled his hand back. He understood. The world was a bubble floating in a sea of madness. Every time a Creator makes a world, the madness leaks in and destroys it.