When communicating with the divine statue, the statue clearly indicated that a century later, a conflict between light and dark would be inevitable. The two sides would determine who would be master and who would be subordinate, or even devour and absorb one another.
As for why the conflict would take place a century later, the statue did not offer much explanation, only vaguely stating that a century from now, Blue Star would completely merge with the Ruins Realm.
By that time, the struggle between light and dark could forge a "Supreme" and advance one to the Heavenly Position.
Chapter 269