500 Years ago, the void suddenly shattered due to unknown reasons. As a result, the door to another world opens frequently! The world of demons, devils, and ghosts all took over the entire real world in an instant. Humanity resists desperately, even using all nuclear weapons!
Later, cultivators appeared frequently and started fighting with monsters from other worlds! After 300 years of war, the two sides finally entered a brief period of peace. In order to develop, the human race has drawn a clear line with the demon world and the demon world, and cut off its original territory.
Fortunately, after this mutation, their original living space expanded by nearly ten times. The human race's living space did not decrease much, but actually increased!
After another 200 years, the human race finally regained its vitality and reached the technological level of 500 years ago. However, due to the suppression of many races, the human race's technology has never been able to progress. But the cultivation civilization is becoming more and more prosperous...
