The Nether Realm holds too many secrets; within this world, Ancient Demon Cities are far from rare!
Billions of years ago, this realm was the center of the All Heavens and Myriad Realms, predating even the history of the Heavenly Realm, said to be where the strongest of the Ten Thousand Realms came to pay homage.
Back then, the Stone Men and cultivators below the Supreme Ancestor God Realm mostly abstained from battle, retreating into seclusion. Today, they have already formed Demon Cities.
This explains why the Nether Realm is rife with Ancient Demon Cities.
Numerous Ancient Demon Cities come together, gathering the mightiest of the All Heavens and Myriad Realms!
Though the great war of that era left the Nether Realm on the brink of collapse and in absolute decline, it does not mean that all the former powerhouses perished.
