In the Cultivation World, the reason there are so many demons from the Outer Realms is precisely because the world's origin will of this Immortal Cultivation world is weak. This weakness causes the protective barriers of the world to constantly form varying sizes of entrances and exits, allowing those demons to slip through and enter the Cultivation World.

The Human Cultivation Alliance in the Outer Realms has two main responsibilities: one is to guard the entrances and exits of the world barrier, and the other is to hunt down the demons that have entered this Cultivation World, along with other creatures from different Immortal Cultivation worlds.

If the world's origin of this Cultivation World were strong enough, many of the entrances and exits of the world protective barrier would heal, making it difficult for new ones to appear, thus making the Cultivation World safer.

Every year, countless cultivators die in the Outer Realms. Although they perish, each of them contributes to the survival of this Cultivation World.