This world, from ancient times to the present, has endured numerous calamities: the chaos of creation, the struggle for the Dao, the dragon-phoenix catastrophe, the war between witches and demons, the chaos of the Blood Ancestor, the rise of humanity, the conflict between immortals and demons, and so on.

In these repeated conflicts, many powerful races have been lost to the river of history, gradually forming a structure where the Dao Ancestor remains aloof, the Immortal Emperor governs the three realms, the human emperor manages the mortal world, the Underworld Emperor rules the underworld, and the Demon Emperor oversees the demons.

The celestial realm was established during the conflict between immortals and demons, led by the Immortal Emperor and supported by the Dao Ancestor, and has existed for millions of years.

The important positions in the celestial court are held by veterans from the great war between immortals and demons.