Fairy:

Since the beginning of Hongmeng, Pangu opened the sky, and the yin and yang of heaven and earth separated. The three realms of immortals, demons, and humans came into being, sharing the vast universe. Billions of years passed, forming a subtle but fragile order of heaven and earth. The Immortal Clan lives in the Immortal Realm of Jiutian Lingxiao, in charge of the laws of heaven, cultivates awe-inspiring righteousness, and takes protecting the common people and maintaining reincarnation as their own responsibility; the Demon Clan occupies the wilderness and the land of thousands of monsters, absorbs the aura of mountains and rivers, transforms into forms and practices, and has thousands of ethnic groups. , Their character may be pure and kind or unruly, and they abide by the rules of survival in the demon world; the human race takes root in the nine states of the mortal world and strives to survive diligently. A few talented people can introduce spiritual energy into their bodies, embark on the road to immortality, and wander between the two worlds of immortals and monsters. In ancient times, immortals and demons had the same origin, and were transformed by the spiritual energy of heaven and earth. They worked together to fight against the remnants of chaos and protect the peace of the world. But as time passes, the Immortal Clan claims to be orthodox in the way of heaven, and views the Monster Clan as an alien species, believing that the demonic nature will bring disaster to the common people. The Demon Clan is dissatisfied with the Fairy Clan's condescension, and wantonly suppresses and plunders spiritual resources. The conflicts between the two tribes accumulate day by day, and eventually the ancient Immortal Demon War breaks out. The war swept through the three realms, the nine heavens collapsed, the wilderness was bleeding, countless immortals and demon kings fell, ancient beasts suffered heavy casualties, and the vitality of the immortal and demon clans was severely damaged. After the war, the Immortal Clan established heavenly rules and delineated the boundaries between the Immortals and Demons. They strictly prohibited intermarriage and communication between the two tribes. They used the Nine Heavens Demon Locking Formation to isolate the passage between the two realms. The Demon Clan was sealed in the depths of the Great Wilderness Secret Realm and would never be allowed to step out of the barrier. The human race was caught in the middle and suffered from the aftermath of the war. For generations, they were afraid of the Demon Clan and hated the aliens. Since then, a thousand-year blood feud has been formed between the Immortals and Demons.