The Ancient Ruins of the Heavenly Demons were said to have once been the imperial dynasty of the Demon Race, established by several peerless Demon Ancestors working together at the height of the Demon Race billions of years ago.
Another legend claimed that they were the burial grounds of ancient great demons. Many powerful ancient demons had been laid to rest there after their deaths, their bones and demon souls eternally sleeping within the Ancient Ruins of the Heavenly Demons.
The legends were too ancient to verify, but one thing was beyond doubt: the Ancient Ruins of the Heavenly Demons were the strongest force of the Demon Race in Chaos Heaven.
Even Yi Yun stepped onto this land with his guard up. If he truly encountered a peerless Demon Emperor from the Ancient Ruins of the Heavenly Demons, he would be in grave danger.
"So many years have passed, yet that city still hasn't changed..."
Yi Yun and Bai Yueyin flew through the air, gazing at the enormous demon city hundreds of kilometers away. Even from this distance, they could see the unbroken city walls stretching across the horizon like a black dragon.
The Heaven and Earth Yuan Qi within a radius of a million kilometers around them was being ceaselessly drawn toward the demon city. The city itself was a massive formation, and the Yuan Qi within it was more than ten times denser than outside. Cultivating there naturally yielded twice the result with half the effort.
This also made Heavenly Demon City a sacred land of cultivation! Many martial artists, especially martial artists of the Demon Race, flocked to Heavenly Demon City, hoping to settle there.
In Heavenly Demon City, one could buy many heavenly materials and earthly treasures that were priceless outside because they were impossible to