The Demon Altar of the Ancient Ruins of the Heavenly Demons was not inside Heavenly Demon City, but in a valley west of the city. This place was the foundation upon which Heavenly Demon City had been built.
It was said that billions of years ago, the Demon Altar had been at the core of Di Bugui's forbidden ground. After that peerless Demon Ancestor pacified the forbidden ground, he built the Demon Altar at its core. While suppressing the forbidden ground, he also gathered the Heaven and Earth Yuan Qi from the nine underground dragon veins there.
Since ancient times, this region had possessed an unparalleled attraction for the Demon Race, drawing countless great demons here to undergo nirvana.
When Yi Yun set foot on this land, he immediately sensed the dense Power of Life filling the area.
The soil here was thick and dark red, giving the feeling of stepping on layers of flesh. According to what the Blood King had said, in ancient times, this place had witnessed not only the nirvana of aged demon beasts, but also an ancient war. This was precisely the battlefield.
The dead demon beasts had come from every level, including demon beasts at the level of Demon Emperors and ancient great demons possessing divine beast bloodlines.
Although billions of years had already passed, Yi Yun could still sense the intense stench of blood filling the place. He felt as though he had been plunged into a sea of blood.
"Once you step onto the Demon Altar and undergo the Nine-Layered Lightning Tribulation, life and death will be in your hands. Even among the Demon Race, history is littered with geniuses who failed their tribulations, whose bodies collapsed and whose martial paths were severed. Have you thought this through?"
After Yi Yun entered