Open System

As soon as Rean asked that, the expressions on Xuve and Glasita's faces changed as one of them responded. "Yes, we do. It was decided a long time ago that the population in this place must never surpass ten million. Every one hundred years, the leading powers of the Upside Down World count the number of living beings here. If the number is above ten million, then culling is done."

'That's quite harsh,' replied Rean. 'How do you decide who's gonna die or live?'

Xuve then explained, "Anyone above the Saint Realm is safe. That's because trying to kill people at the Elemental Transformation Realm or higher could potentially lead to more damage than we can afford. As for those at the Saint Realm and below, they would be chosen randomly. There is a thing called the Death Roll organization. It's maintained in conjunction with all the leading powers of the Upside Down World. That's to ensure that not only one side would have their people and demon beasts eliminated."