Later, with the establishment of reincarnation, the world origin power was sealed, and the Heaven and Earth Primordial Spirit became barren. Those ancient great gods and Immortals, Demons, Buddhas, and Demons had no choice but to ascend to the Upper Realm, establishing the Celestial Rules, dividing Yin and Yang, and leaving Divine Dao Cultivation Method alone in the world.
But there are exceptions to everything. Those ancient great gods and Immortals, Demons, Buddhas, and Demons did not leave cleanly, leaving behind many messy things, and even deliberately arranged covert moves, causing quite a few disturbances.
For example, the chaos caused by the Drought Demon King back then was a Third Grade Ghost King who unexpectedly acquired an evil object left behind by the ancient Great Demon "Drought Demon." In the end, they merged into one, transforming into the Drought Demon King, causing great chaos in the Northern Lands, with numerous deaths and injuries among Divine Beings.
