It is said that at the beginning of the world, all natural creatures gave birth to three ancestral gods, namely Emperor Chiyan, Supreme Immortal Xuanshuang and God Qiyun. Their divine power was so great that nothing in the world could resist it; correspondingly, the opposite worlds of demons and monsters were also given birth to. According to legend, in a certain era in ancient times, the generals of the demon world and the monarchs of the demon world joined forces. The combined army swept through the human world and was unstoppable. The three gods suppressed the chaos in the lower world. Although they repelled the demon world and the demon world within seven days, Xuanshuang was seriously injured. Retreating to the Xuanshuang Icefield at the end of the continent, life and death are uncertain; while Emperor Chiyan leads the immortal cultivators from the human world and the demon world to form a heavenly realm and control all living beings; God Qiyun immediately becomes a Buddha and retreats to the virtual fairyland of Kunlun with the title of Fighting Buddha, and no longer cares about worldly affairs. From then on, there was peace in the world, but the three gods parted ways and had no relationship with each other anymore.