After humanity's long years of destruction, Earth finally couldn't bear the burden any longer and decided to give itself a thorough cleanup.
The apocalypse arrived. Humanity, cultivators hidden within human society, spirits, and a new zombie race born through evolution all began a long and brutal war.
Earth was slowly repairing itself. Watching these races change during the cleanup, it realized it couldn't let them keep going. That would waste all its efforts and leave it even more battered.
Earth's will decided to stop indulging them. With the last of its strength, it tore open the void and flung all those beings unlike ordinary humans off Earth, depositing them on another habitable planet.
Newly arrived on a primitive planet, the bewildered newcomers temporarily joined forces to survive and began a new life.
As time passed, the four races each developed in their own way. These beings, once Earth's most advanced inhabitants, and their descendants adapted to life on the new planet, then expanded into space and divided up their own star systems.
Earth recovered slowly, just as its will had hoped, and the people there began exploring the stars as well.
Earth discovered that its power grew stronger as humanity gained control of more planets. At last, it remembered the beings it had cast out and decided to go see them.
The will of the planet where those races had first landed, which they had hailed as their second
