C172

"Senior, what is that seven-colored vicious bird?" Cang Yun asked Principal Xiao.

"That's a flaming bird. It possesses a strand of the bloodline of the archaic spiritual beast, the Vermillion Bird. There are many of these types of spiritual beasts in the Returning Ruins, so they can't be considered powerful spiritual beasts. Principal Xiao calmly explained to Cang Yun.

Cang Yun nodded his head. These few days, he had been at Principal Xiao's place and roughly understood the strength of the spirit beasts in the Returning Ruins.

The weakest of them were ordinary Spirit Beasts, such as the Purple Gold Python that was killed earlier. These Spirit Beasts had low bloodlines and could only be classified as ordinary. They were considered the weakest existence among the dust.

After the ordinary Spiritual Beasts were the Savage Spiritual Beasts, the Prehistoric Spiritual Beasts, the Ancient Spiritual Beasts, and even the legendary Divine Beasts!

One of the most important criteria for a spirit beast's strength was its bloodline. Generally speaking, a spirit beast with a savage bloodline would be stronger.

If one could kill a savage spirit beast, then taking its precious blood would allow one to refine pills with an extremely high value.

The Fire Bird's corpse that Cang Yun had found in the immortal palace was a type of Savage Spirit Beast. Even now, this corpse was still in Cang Yun's storage ring.

Time continued to pass. When the sky was about to turn dark, Cang Yun and the others finally approached the Holy City.

Looking down from the gray plains that spanned tens of millions of miles, a city rose from the ground. It was built on a gigantic stone pillar that protruded from a lone mountain peak.

The city was a black fortress.

The foundation stone pillar below was a single peak that had been flattened. It was hundreds of miles in radius and tens of thousands of meters high.

A city was built on a stone pillar that was tens of thousands of meters high. From afar, it looked like a giant dragon soaring through the endless sky.

It was hard to imagine that the Holy City had actually been established in such a way. Even the experts of the human race would sigh at this scene!

As the Black Scaled Eagle flew closer and closer, Cang Yun slowly saw the outline of the city. Cang Yun only felt a vast and majestic aura gushing out, as though he was an emperor, assaulting both his body and mind.

Cang Yun's chest felt as if it was filled with a strange blood energy, and his blood was boiling.

This city, in terms of grandeur, was simply too pale.

The foundation of the entire Holy City was tens of thousands of meters high. Within the city, there were many tall buildings, so tall that many of them were hidden in the clouds.

The walls of the holy city seemed to connect with the sky, boundless and boundless.

At the very center of the holy city, there was a vast and tall divine pagoda that reached into the heavens. It was a grand and majestic pagoda that would shock anyone.

The whole Holy City was surrounded by solitary peaks. The rock walls were as smooth as a mirror; there was no road at all, only a black iron chain as thick as a bucket hanging down. One end of the iron rope was inserted into the craggy rock wall, while the other end was connected to a plain several tens of thousands of meters below.

Looking down from above, one end of the iron chain was thick and towering, while the other end was getting thinner and thinner. Finally, it disappeared into the vast sea of clouds, making people's hearts jump in fear.

These iron chains served as a bridge in the void, as well as a passageway to the holy city from the Realm of Return to the Ruins.

Such a method of construction was obviously inconvenient to enter and leave the city. However, there was one biggest benefit of it, and that was that it was easy to defend, difficult to attack.

There was no lack of Savage and even Prehistoric level Spiritual Beasts within the beast tide. If it was an ordinary city, it would have long since been submerged by the beast tide.

However, a city built on a stone platform that was tens of thousands of meters long was a lone peak. As long as the iron chains were put away, ordinary spirit beasts would not be able to attack it.

The Black-Scaled Eagle descended from the bottom of the iron rope, not directly flying into the holy city, because around the holy city, there were many halos of light that revolved, emitting a terrifying might. These were great formations set up by the holy city, and if anyone who entered were to be mercilessly killed by the great formation.

Cang Yun and Cang Yue followed Principal Xiao and jumped down.

The moment he stepped into the ground, Cang Yun immediately felt the incomparably dense and violent Spiritual Energy of Heaven and Earth.

The Spiritual Qi of Heaven and Earth here was several times denser than the inner parts of the Qingzhou City. When warriors trained, the concentration of Spiritual Qi of Heaven and Earth was very important. Just this point made Holy City a holy land for cultivation.

However, the Spiritual Qi of Heaven and Earth in this place was filled with a tyrannical aura. Normal people would not be able to absorb it. Only geniuses who cultivated top-notch techniques would be able to do so without fear.

In other words, if an ordinary martial artist were to come here, not only would they not receive the slightest bit of benefits, they would even lack the qualifications to practice.

This caused Cang Yun's heart to tremble, and he was secretly shocked.

"How do you feel?" Principal Xiao asked with a smile.

"Shocking!" Cang Yun and Cang Yue replied at the same time.

"That's only natural. The first time I came to Holy City, I was in the same mood as all of you." Principal Xiao nodded his head. He wasn't surprised at all.

"Principal Xiao, have you ever gone to Holy City to train?" Cang Yun asked.

Principal Xiao nodded his head slightly. "After cultivating for a few years, he realized that he had exhausted his potential and thus left."

"Alright, let's go up first."

With that, Principal Xiao waved his hand and led Cang Yun and his son up the iron chain.

The iron rope that was tens of thousands of meters tall was steep and straight. The two men could only release their spirit energy and attach it to their hands and feet before they could attach themselves to it and climb up.

At this moment, the sky was slowly darkening.

The walls of the Holy City flickered with faint patterns of light. One after another, rings of light lit up, allowing Cang Yun to clearly feel the fluctuations of immense power.

For millions of years, the Holy City had stood guard, engraved arrays on the walls time and time again. There were even hundreds of Saints that had contributed to this array, causing it to intertwine and envelop every inch of the Holy City's walls, making it indestructible!

On top of the city walls, many crossbows engraved with fine patterns quietly extended out of their muzzles, facing the surroundings, those cold crossbows released a dazzling light, connecting with the entire formation and letting out a faint trembling sound.

Those crossbows were like ferocious beasts that were hibernating in the dark night. Although they were not aimed at the azure cloud, it felt as if a fine layer of goosebumps had appeared on its skin.

During the beast tide, the biggest threat of Holy City was the attacks of the flying spirit beasts. These crossbows were the nemesis of the flying spirit beasts.

It could be said that it was a fortress built by countless Azure Province experts from generations to generations. It was the umbrella of the entire Azure Province!

After climbing the iron chain, Cang Yun and the other two finally arrived outside the main gate of the Sacred City.

This door was entirely made of unknown metal, and it exuded an indestructible aura. At the same time, it was thick and wide. Standing outside the door, it gave off a sense of insignificance.

At this moment, the door was tightly shut.

Principal Xiao took out a command medallion from his robe and poured spiritual energy into it. The command medallion seemed to come to life as it slipped from his hand and disappeared into the door.

In just a few breaths, the door rumbled open.