Ghosts belonged to the [Netherworld] by nature. Only because they had lost a definite "place for the cycle of life and death" had they become formless spirits, appearing and vanishing unpredictably.
Generally speaking, there were three kinds of ghosts.
The first arose from accumulations of Yin Qi and Turbid Qi, kindling a Primordial Spirit amid their ignorance. Fierce and baleful by nature, they loved to feed on blood and vitality, much like beasts and birds;
The second were mortal creatures or cultivators whose lifespans had run out, or whose furnace cauldrons had been damaged. They lacked the five lifetimes of grace enjoyed by Foundation Establishment True Persons, which allowed reincarnation, yet refused to close their eyes in death. Seeking another way to attain the Dao, they swallowed yin and turbid Spirit Chance, willingly degenerating into ghosts;
Then there were the yin creatures and evil entities born of the Ghost Mother. The process defied human decency and was horrifying to hear, so no more would be said of it.
Within the whole of [Fengdu], the Eighteen Levels lay above, and the Bottomless Abyss below.
The former bordered the Great Void, while the latter touched the Netherworld.
Jiang Yi was currently in the Bottomless Abyss beneath the Eighteen Levels.
The ghosts here had all taken shape from condensed Yin Qi and Turbid Qi. They passed their days imitating human behavior and appearances, gradually forming a Ghost Kingdom.
"Junior Brother Jiang, don't panic."
Facing the encircling ghosts, Han Li raised his hand and released a Thousand Souls Banner:
"We demonic cultivators are the granddaddies of dealing with ghosts and yin creatures! Just watch what I can do!"
The Thousand Souls Banner swelled in the wind, growing over five feet long before falling into Han Li's palm.
Holding its long shaft made from bones,