Castle of Black Iron

After leaving their airboat, it only took Zhang Tie and Bai Suxian a short while to arrive at the core region of Centralpolar Mountain.

On the way, Zhang Tie felt strange as not a single bird could be seen within 600,000 square miles. Not until they arrived at the core region of Centralpolar Mountain did he know why Centralpolar Mountain could be listed as one of top ten perilous lands in the South Border.

When they were about 150 miles away from the core region of Centralpolar Mountain, the landscape suddenly changed as the lush woods were instantly replaced by bare, pitch-dark rocks and crisscrossed gullies. Because of the unique geographic environment, Zhang Tie saw many mutated venomous living beings among those rocks and gullies.

Some airship wrecks spread over the bare surface of the land which was covered with black spots; perhaps they were eroded by something. Besides, Zhang Tie saw many beast bones.

Before they arrived here, it was sunny; however, when they came here, the weather abruptly turned weird. In the periphery of Centralpolar Mountain, some places were hot with big suns while the other places were facing the rain. As for the earlier places, they might be filled with bloody smell every once a while.

Under his lotus-flower eyes, Zhang Tie could see layers of invisible energy in the space around Centralpolar Mountain, whose movements caused a sharp change in the temperature surrounding Centralpolar Mountain. As a result, the weather nearby Centralpolar Mountain turned as mobile as a kid's face.

Closing his eyes, Zhang Tie sensed that the elements in the elements realm turned berserk nearby the region of Centralpolar Mountain. Before coming here, the elements in the Elements Realm were as calm as water level; however, after coming here, four elements turned as berserk as an ocean being troubled by storms.

"It's Centralpolar Mountain ahead of us..." Bai Suxian said as she pointed at a mountain in front of her.

The entire Centralpolar Mountain was like a sharp sword pointing into the sky. As high as over 10,000 m, it was pitch dark, barren and formidable.

The number of knights increased sharply here. It appeared that knights were gathering here from all directions as they were all heading towards the peak of the Centralpolar Mountain.

After arriving at the peak, they saw a huge, pitch dark cave leading all the way to the underground like Dragon Cave in Hidden Dragon Island. All the knights were flying into the cave.

Zhang Tie and Bai Suxian also flew inside at the same speed.

Like Bai Suxian had said, all the knights gave way to them out of fear of their speed. In the eyes of the others, their speed denoted that they were heavenly knights. When Zhang Tie and Bai Suxian passed by them, they were all shocked as they wondered what immortal beings were Zhang Tie and Bai Suxian.

As they were holding hands with each other, the others were not sure which one was a heavenly knight, Zhang Tie or Bai Suxian.

When they came to 20,000 m beneath the earth, the road began to be sinuous and have bypasses. Whereas, Zhang Tie was not afraid of going in the wrong way; because huge arrowheads had been painted by fluorescent powder on the walls of the bypasses. Many independent knights were wandering near those bypasses and glancing at those people behind them.

Some independent knights shouted, "Team members wanted; team members wanted. The road leading to the Dongtian of Great Wilderness Sect has been marked by earlier brothers. Is there anyone who would like to join me. Unity is power. We grassroots knights should unite with each other. As three of the top six major clans have already dispatched people here, including the powerhouses from Lord Guangnan's Mansion. Even an independent shadow night could barely get any benefits. If we don't team up, we might get nothing but shit there..."

"Knights from top six major sects have already claimed to clear here. Team members wanted..."

"I'm an earth knight in a three-change realm. I'm looking for earth knight partners, 8 people at best. We could form a bigger battle formation..."

Many knights were shouting under the ground there. After hearing such voices, some knights such as Zhang Tie and Bai Suxian neglected them basically as they continued to fly inside while some other knights stopped to inquire them about the details or joined teams.

In order to confront those forces from major clans, earlier independent knights chose to expose this secret to the public as soon as possible, causing the Mountain of Brilliance to be boisterous at this moment. By contrast, these independent knights hereby left marks all the way here so that other independent knights coming after them could gather up.

Zhang Tie felt speechless about such a situation. As for ordinary people, knights were powerhouses; however, those ordinary people didn't know that the ordinary knights were also relatively weaker sometimes. If not unite with each other, these ordinary earth and black iron knights were never qualified to compete with those major sects and clans.

Even though knights were striving for survival in many cases.

The patch in the mountain cave was pretty sinuous and grew increasingly narrower like a maze. As a result, Zhang Tie and Bai Suxian slowed their speed.

After flying over an underground magma lake covering hundreds of square miles and tens of thousands of meters more downwards, the space in front abruptly became open as a spacious underground space appeared.

This huge underground space covered almost 600,000 square miles as it was filled with dozens of meters high black metal spines in the shape of stalactites, which came into being naturally. Zhang Tie and Bai Suxian were shocked by the marvel of mother nature.

What was more surprising was that the ground of this space appeared completely to be an unimaginably huge piece of natural metal. On the ground covered with metal spines, there were 81 huge black holes, over half of which were reflected with flames as white high-temperature flames spurted out of the holes, the height of which ranged from dozens of meters to over 100 m. Given the color of the flame, it could be estimated that they would be at least 5,000 degree Celsius in temperature, which was even higher than that of underground magma. Even steel would melt at about 1,600 degree Celsius. Facing such a high temperature, shadow knights would perish; even heavenly knights couldn't stand too long...

It was out of Zhang Tie's imagination that the Dongtian of Great Wilderness Sect could be located in such a perilous environment...