The Progenitor's Path

As he slowly refined the Myriad Forms Demon Lord, He Heng's expression grew increasingly grave. After a long while, he opened his eyes and murmured, "The Myriad Heavens Demonic Path's grand compendium—the Yuan Shi Forbidden Book! It actually appeared in this world? No wonder this realm is so strange. That so-called cycle of reincarnation is simply a rule intrinsic to the Yuan Shi Forbidden Book. This supreme divine treasure of the Demonic Path was forcibly seized by Huan Wushang, the Primordial Demon Lord, back in the day. Though its immense power eventually struck back and wounded him, the book itself was also badly damaged and scattered throughout this world... Then Above the Heavens must be the Primordial Demon Realm, the source of the Myriad Heavens Demonic Path. The Primordial Demon Lord wouldn't simply give up after failing to seize the Yuan Shi Forbidden Book. It makes sense that he would leave something behind."

"The Yuan Shi Forbidden Book was crafted by the 'Demon Ancestor,' who once attained Supreme Great Luo. It records the true names of the top experts in the Myriad Heavens Demonic Path. Whenever a demonic expert falls, a fragment of their True Spirit is absorbed into the book. The Myriad Forms Demon Lord was one of them. The revived Yuan Shi Forbidden Book brought him back to life and made him its servant. Besides him, it revived several other demonic experts as well. Since the Yuan Shi Forbidden Book itself is an Innate Supreme Treasure, it isn't bound by the River of Time. So these resurrected demonic experts are scattered across different eras of this world..."

He Heng finally understood why the Immortal Domain of later ages had no immortals. When Barren Heavenly Emperor severed the ages, the Immortal Domain still had powerful Immortal Kings such as