The origin of the universe is "Tao", and the essence of Tao is "a perfect closed loop of cause and effect": everything has a cause and must have an effect. Only when the causal chain is completely closed can the world survive stably. "Life" is the starting point of cause and effect, "death" is the end point of cause and effect, and reincarnation is the cycle of cause and effect, which together maintain the balance of Tao.
In ancient times, the "Tao Shou" of the original world (the protagonist's previous life) discovered that the closed loop of Tao had a fatal flaw: "In life, there must be death, and in success, there must be destruction." The entire closed loop of Tao will be completely annihilated after ten thousand years, and all existence will be reduced to nothingness. In order to retain the possibility of "life", he created the "method of stealing": cutting off and stealing the causal chain of others/the world, directly grafting other people's "effects" to his own "causes", skipping the long process and directly gaining strength, longevity and rule authority.
However, the method of stealing the Tao has been abused by fellow travelers. They are no longer satisfied with saving the world, but want to steal the "core cause of life" of the Tao itself and monopolize the power of immortality. In the end, the ancient Tao thieves forcibly stripped away the "cause of life" of Tao, causing the causal chain of the original world to completely collapse and split into three nested "causal fragment worlds". All Tao thieves were backfired by the distortion of cause and effect, and became twisted and weird existences.
