(I've read everyone's comments. Since both sides had quite a few supporters, I weighed everyone's opinions and finally decided on a compromise: briefly describe the Undying Heavenly Emperor's era, which will also serve as an opening to the Primordial Era.)
According to tales handed down by the elders, more than sixty thousand years ago, a Great Demon emerged, bringing about the fall of Emperor Venerable's Heavenly Court. The Myriad Daos and Heavenly Heart collapsed along with it, burying that supposedly glorious era in the dust of history.
In the eyes of the world, the so-called Heavenly Court gradually became an untraceable myth, while Emperor Venerable, portrayed in ancient records as an unparalleled god, had now been reduced by the tides of history to a lifeless symbol, beginning to fade from people's memories.
From then on, the Heavens and Myriad Realms entered the so-called "lost sixty thousand years." Throughout those long years, the suppression of the Myriad Daos of heaven and earth reached almost its utmost limit. Across the Sea of Stars, even Immortal Platform cultivators were scarcely seen, let alone those who had achieved Severing the Dao. Dragon Transformation cultivators stood at the pinnacle of many Life Source Lands.
Only in a handful of special Ancient Star Domains, such as Big Dipper, Ziwei, and the Primordial World, could Immortal Platform experts occasionally be seen. Yet this was almost the limit of the Universe. Under the suppression of the Myriad Daos, even Severing the Dao was impossible. Occasionally, prodigies of peerless aptitude and talent appeared, only to fall at that threshold without a single exception.
The myriad races of the Universe suffered a tremendous regression over those sixty thousand years. Even the flames of civilization dimmed. Many legacies ceased to exist entirely, and even some ancient races were affected, vanishing completely