The descending of the Spiritual Realm brought an everlasting impact on Planet Earth.
Firstly, the collision of the Spiritual King Comet resulted in a terrifying earthquake and tsunami which destroyed almost half a continent. Billions of civilians were killed in this disaster.
If not for the fact that Planet Earth's will had forcefully interfered to restore the biodiversity of the planet, they might be a destructive cycle of life.
Even so, this huge disaster was an opportunity for the planet to start anew and the survivors were barely surviving.
However, there was still another problem - the remaining Immortal Cultivators!