C2000 The source of the undead world

The Myriad Heavens was birthed from the Primal Chaos, so the Primal Chaos was like the mother of the world, and the primal chaos energy was naturally what the Universal World needed the most to perfect.

The reason why the world was considered a world was because a world had its own unique laws of heaven and earth, laws, order, time and space, and so on. In short