When thinking of the Cosmic Dao, another thing that Chengming mentioned to him came to mind.
It was the Soul-Devouring Abyssal Prison, which is very likely formed from celestial corpses.
It is said that over fifteen thousand years ago, a disaster occurred in the world. A race called "Celestials" suddenly descended upon the Cultivation Realm for some unknown reason, sparking an unprecedented celestial war. In the end, the Cultivation Realm emerged victorious, annihilating the Celestials. As their bodies wouldn't decay, they were all cast into space.
There are not many records of the celestial war, and what is heard today is merely passed down by word of mouth.
The truth within is hard to discern.
