Chaotic Heavenly Demon Realm!
This was an Origin-Level Great Realm far from the Prehistoric World, yet inextricably linked to it!
By the standards of modern Cangyuan, the Prehistoric World was Blue Star, while the Chaotic Heavenly Demon Realm was the moon.
Within the Chaotic Heavenly Demon Realm dwelled the remnants of the Demon Race that had retreated into the Heavenly Demon Realm back then.
After developing for so long, the Demon Race had recovered some of its vitality.
And at the very center of the Heavenly Demon Realm!
Upon a Demon Peak resembling Mount Sumeru stood a grand and terrifying Dark Palace!
The plaque read: Heavenly Demon Palace!
Within the Heavenly Demon Palace, Demon Ancestor Luohu sat atop the Twelve-Petal World Destroying Black Lotus, comprehending the Demon Dao while considering how to disgust Hongjun and counterattack the Prehistoric World.
During the Dao-Demon Conflict, Demon Ancestor Luohu had not perished, nor had his true spirit returned to silence.
After being defeated by Dao Ancestor Hongjun, he swore an oath to the Primordial World's Heavenly Dao: he would transform into the Outer Heavenly Demon Realm and unleash Inner Demon Tribulations, forcing Prehistoric World cultivators to cultivate not only their mana but also their hearts. Otherwise, Inner Demons would invade and destroy all their cultivation. This could also be considered a means of regulating the conduct of Prehistoric World cultivators.
It counted as completing the Primordial World's Heavenly Dao!
Naturally, the Heavenly Dao had left Rahu a sliver of hope for survival!
From then on, Rahu had retreated into the Heavenly Demon Realm and lain dormant.
By now!
Rahu had long since attained the Dao as a Hunyuan Great Luo Golden Immortal!
And he was even at the Hunyuan Great Luo Golden Immortal Ninth Heaven!
If the Six Saints had only just set