"Master, seal the entire hall," Liu Wuxie said, satisfied with everyone's attitude.

With a wave of his hand, invisible restrictions descended and sealed the entire hall off from the outside world.

Qiao Bian and Han Feizi were both part of this team, while Elder Han was responsible for the Heavenly Sealing Array. Liu Wuxie's three senior brothers were also present, and their cultivation had advanced swiftly, with all three now at the pinnacle of the Earth Immortal Realm.

Everyone turned their attention to Liu Wuxie, uncertain of what he intended to do next.

Then a golden light appeared in Liu Wuxie's palm, and the moment it did, everyone's expression changed, including Hua Feiyu's.

Nightmare City began to expand, transforming into a golden palace.

At that exact moment, space split open without warning, and a young girl stepped into the main hall.

Liu Wuxie narrowed his eyes. With the main hall sealed, not even quasi-immortals could enter. So how had this little girl managed to get in?

She tore through the restrictions as though they did not exist, and the sight shocked Liu Wuxie to his core.

"Interesting! You forged Nightmare City into an immortal artifact," the little girl said, smacking her lips in admiration as she circled Nightmare City.

"An immortal artifact!"

"This is an immortal artifact?!"

The elders were still relatively young, and none had ever seen a true immortal artifact. How could they not be stirred when Nightmare City appeared before them? Even Hua Feiyu looked shocked.

After circling Nightmare City once, the little girl stopped in front of Liu Wuxie and began examining him.

For some reason, the moment Liu Wuxie faced her, a chill ran down his spine, and a powerful sense of danger rose in his heart.

A moment later, a terrifying force erupted from the little girl and nearly sent Nightmare City flying.

"An immortal artifact!" Liu Wuxie exclaimed. He had not expected this little girl to be the manifestation of an immortal artifact.

He already knew that immortal artifacts could assume humanoid form, and he had long since sealed Nightmare City's artifact spirit, forbidding it from manifesting physically. Its current state was also better suited for battle.

In the celestial realm, people could find ordinary immortal artifacts everywhere, and most of them lacked even the faintest trace of consciousness, much less the ability to take human form. However, in the mortal realm, immortal artifacts stood at the absolute pinnacle.

Immortal artifacts could ascend into the celestial realm as well, but most of them preferred to remain in the mortal realm. After all, the laws of the celestial realm would slowly erode their consciousness once they ascended, reducing them to ordinary artifacts and forcing them to start again from the beginning.

The sudden appearance of two immortal artifacts instantly left everyone numb.

A clash between immortal artifacts had already begun, and Nightmare City showed no intention of yielding. It released a terrifying aura of its own to resist the little girl. Although Liu Wuxie had subdued its artifact spirit, the spirit's thoughts and intelligence remained intact.

"You have just advanced to the level of an immortal artifact, and you want to contend with me?" the little girl asked, baring two sharp canine teeth as she released an even more terrifying aura that sent everyone in the hall flying away, including Hua Feiyu.

Although Hua Feiyu had reached the Quasi-Immortal Realm, he held only a faint contract with the Radiant Mirror and had no way to command it as he pleased. Whenever he needed something from it, he still had to negotiate.

"Radiant, that's enough!" Hua Feiyu shouted, shaking his robe to stop Radiant from going any further.

Though both were immortal artifacts, the Radiant Mirror far surpassed Nightmare City in level. One had only advanced recently, while the other had existed for over a million years. There was simply no comparison.

But it would not take long for Nightmare City to surpass the Radiant Mirror because Liu Wuxie nourished it every day with celestial realm laws. That was precisely what the Radiant Mirror lacked.

After Radiant withdrew her aura, she pouted unhappily. "I also want immortal runes! A large number of them!"

As she spoke, she glared at Liu Wuxie and openly demanded immortal runes. That instantly darkened Liu Wuxie's face.

He nourished Nightmare City daily with immortal runes only because he had subdued it and it belonged to him. What did any of that have to do with the little girl?

"Radiant, stop fooling around. We still have more important matters to handle," Hua Feiyu said unhappily.

"Who says I'm fooling around? I know that you have a large amount of immortal runes in your body. Don't forget that I once saved your life," Radiant said, flashing a mischievous grin.

Back during the Myriad Race Ceremony, the Radiant Mirror had indeed saved Liu Wuxie's life.

After Hua Feiyu explained matters, everyone finally realized that this little girl was the Radiant Mirror's manifestation, the immortal artifact that protected the Heavenly Dragon Sect. Until now, they had only heard of it in legend and not truly seen it.

"I can give you immortal runes, but you have to do something for me," Liu Wuxie replied with a sly smile. He had just been wondering where he could find more helpers, and Radiant, as an immortal artifact, could use her power to temper these hundred people every day.

Radiant agreed without the slightest hesitation. "That's a promise!"

Immortal runes could regenerate, so Liu Wuxie was not overly worried about exhausting them. In any case, he only needed to use the immortal runes to temper the immortal artifact, not to let the little girl absorb them directly.

Once they reached an agreement, Radiant became visibly delighted and crouched on the chair beside Hua Feiyu.

Hua Feiyu could only smile bitterly. Even after living for countless years, Radiant still retained the temperament of a child.

"From now on, all of you will enter Nightmare City. I already have a place prepared for your cultivation," Liu Wuxie said as he opened Nightmare City and allowed everyone to enter.

Song Ling stepped in first. The instant everyone entered, a terrifying pressure descended on them, making them feel as though an enormous mountain were weighing down on their backs.

This was the power of an immortal artifact, capable of suppressing them at any time. Those with weaker cultivation were shaken so badly that blood trickled down their chins.

Radiant transformed into a streak of light and shot into Nightmare City, beginning to wander around, while Liu Wuxie and Hua Feiyu remained behind in the main hall.

"Master, this is an immortal pill, along with an immortal art. Try to reach the Immortal Realm within the next six months," Liu Wuxie said as he took out an immortal pill and an immortal art and handed them to Hua Feiyu.

With the immortal pill protecting him, Hua Feiyu would have at least a seventy percent chance of success even when facing life-and-death tribulation.

By now, it was no longer a secret that Liu Wuxie had obtained immortal pills, nor his mastery of immortal arts. Even so, when Hua Feiyu accepted the immortal pill, his hands still trembled uncontrollably.

"Very well. I will aim to reach the Immortal Realm within the next six months," Hua Feiyu said solemnly.

The Heavenly Dragon Sect was about to face a calamity, and as its sect master, Hua Feiyu naturally had to remain standing at the sect's forefront.

Once Nightmare City returned to the desolate world, it became isolated from the outside world. After Liu Wuxie left the main hall, Hua Feiyu sealed the restrictions, announced his seclusion, and appointed Dong Wu to act in his place for the time being.

When Liu Wuxie returned to the Heavenly Dao Society, he did not rest for even a moment. Bi Gongyu and the others had already been waiting for him, along with the Heavenly Dao Society's elders.

After more than a year of development, the Heavenly Dao Society had finally stabilized. The upper echelons now had time to cultivate, since they could already entrust alchemy and blacksmithing responsibilities to others to oversee. This meant the Heavenly Dao Society had already survived its most difficult stage. Now, the most urgent matter was raising its overall strength.

Liu Wuxie brought out Nightmare City, allowing Bi Gongyu and the others to enter. He had already opened two separate worlds within Nightmare City, one for the hundred-man team and the other for nurturing the Heavenly Dao Society. 𝓯𝙧𝓮𝓮𝒘𝓮𝙗𝙣𝒐𝒗𝒆𝓵.𝓬𝓸𝒎

At first glance, those two worlds seemed unrelated, but in truth, the two groups would clash every single day. This would train their unity, strength, adaptability, and coordination.

Compared to the Heavenly Dragon Sect's hundred-man team, the Heavenly Dao Society's side was far weaker in cultivation. The Heavenly Dragon Sect's team would serve as the primary offensive force, responsible for confronting the immortals head-on. This meant that Mu Tianli's team would focus on defense and serve as the shield against the immortals' invasion.

That principle also served as the basis for their training. The Heavenly Dragon Sect's team would cultivate offense, while Mu Tianli's team would focus on defense. High lethality alone would never be enough. They also needed the ability to shift between attack and defense as the situation required.

The moment Liu Wuxie entered Nightmare City, Shi Qian took the lead on the Heavenly Dragon Sect's side. For the time being, he held the greatest prestige among them and also possessed the highest cultivation.

Everyone stood in orderly rows before Liu Wuxie. Within this newly opened world, there were training grounds for martial techniques, cultivation techniques, and immortal arts.

The immortal energy filling the atmosphere was incredibly dense, and several people had already made breakthroughs in cultivation. More importantly, Liu Wuxie had established an enormous time spiritual array, meaning that one day outside was equivalent to a year inside.

Though the outside world would see only half a year pass, those inside Nightmare City would experience a vast stretch of time.

"I'll keep this brief. From today onward, every one of you will squeeze out every ounce of your potential. If anyone still fails to reach the Quasi-Immortal Realm after six months, I will personally cripple their cultivation," Liu Wuxie declared.

He treated everyone equally. Anyone who failed to break through to the Quasi-Immortal Realm after six months would cripple themselves by their own hand. That instantly increased the pressure on them, as they had to give absolutely everything to survive.

Radiant sat off to the side, without saying a word. Liu Wuxie had given her most of his immortal runes as he had promised.

New immortal runes were born each day in the desolate world, so Liu Wuxie did not need to worry about them disappearing entirely. He had also moved most of the treasures he had taken from the Outer Astral Spacetime here, filling Nightmare City with terrifying celestial realm laws that Radiant enjoyed immensely.

"These are ninety-nine immortal arts and ninety-nine cultivation techniques. Each cultivation technique and immortal art has been tailored specifically for its owner. For the next six months, all of you will train according to them," Liu Wuxie said, sending out ninety-nine golden rays that entered everyone's soul seas.

The moment Radiant heard that there were ninety-nine immortal arts, she nearly toppled out of her chair. A single immortal art alone was enough to shake the world, yet Liu Wuxie had taken out ninety-nine of them in one move.

It was not only Radiant who was stunned. Everyone else wore the same expression of shock. Yet despite that shock, not one of them dared to voice it aloud. They all understood that this was a secret, and anyone who dared to leak it would face Liu Wuxie's wrath.

Since Liu Wuxie had personally selected them, each of them was trustworthy.

"Wuxie, we will never forget this grace!" Shi Qian suddenly dropped to one knee and looked at Liu Wuxie as though he were a god.

"We will never forget it!" a unified voice echoed through Nightmare City.

"Repay me with your actions. Begin now," Liu Wuxie said. He disliked empty formalities and preferred proof through action. Whether they would survive the crisis six months from now would depend entirely on the outcome of their cultivation.

One after another, everyone immediately dedicated themselves to cultivation.

"From this moment on, you will serve as their instructor. Use your laws as an immortal artifact to temper them and let them adapt to fighting immortals. That way, they won't freeze when they face immortals in the future," Liu Wuxie said.

"Don't worry about it. I'm best at tormenting others," Radiant replied with a cold snicker.

Seeing that expression, Liu Wuxie could only offer a silent prayer for everyone.