Mo Bi'an's memories were vast. The greatest help they gave Gu An was her understanding of the Reincarnation Calamity.
The Reincarnation Calamity could indeed reincarnate into different times and spaces, even into the past. Yet whether it was the past or the future, the main body's power could not interfere. Once the reincarnated body died or used the main body's power, it would be forcibly expelled back by the Heavenly Dao.
This reminded Gu An of how Ji Xiaoyu had used the Innate Dao Talisman's power within the Seven Stars Spirit Realm before vanishing soon afterward. It seemed she had been driven away by the Reincarnation Calamity.
This gave Gu An a deeper understanding of the Heavenly Dao.
The Heavenly Dao was more like a set of rules, a collection of the Great Dao—meticulous and immensely overbearing.
Gu An stopped dwelling on it and turned his gaze toward the great hall. The hall was vast, yet it concealed many stark differences. The enormous stone pillars were embedded with numerous special Spirit Stones.
This city was a Demon City. According to Mo Bi'an's memories, there were many such Demon Cities in the Extinction Domain. Although there was no stronger existence above Mo Bi'an, all Demon Cities were forces left behind by the Supreme Demon Realm. The Supreme Demon Realm had once been incomparably powerful, with the goal of devouring Great Worlds. Later, a mysterious existence slew its Realm Lord, and it shattered into fragments from then on. Mo Bi'an had yet to rise at that time.
A million demons were hidden within the Demon City. Though these demons seemed no different from Heavenly Demons in the eyes of Great World living beings, many forces stood side by side within the Extinction Domain, and they kept to their own waters with Demon