Humanity began to communicate with different species. On the 21st of August, 2298, they united with the Elven Empire, the Dwarven United Front, and the Undead Union to fight off the Void Walker who rose up against these factions.
"Senior Brother, this is the map of the Demon Beast Mountain Range and the beast breeding bag. By infusing spiritual energy into the bag, you can capture demon beasts that have no resistance and store up to three of them in the bag."