[After thousands of years the divine plans that are where the most powerful humans in the universe live began to realize the existence of the underworlds and decided to destroy all the underworlds.]
[The underworld with the demons never attack the worlds of the living and only hide, so after many sacrifices the warriors of the divine plan they managed to eliminate all the first underworld.]
[Yet from time to time the warriors of the divine plan discovered that new underworlds would always emerge and that they could only discover these underworlds after a continent or world was destroyed.]
[Humans always want benefits for everything they do, in the first destroyed underworlds they found that to create an underworld a demon must use a very powerful treasure as a sacrifice and these treasures must be useful to humans.]