Su Xun decided to go and take a look. According to Chongyun, since the Fatui were so abnormal and were researching some evil power, they must be doing something dangerous, which might even affect the safety of Liyue.

As a disciple of the Liyue Immortal Clan, he had to confirm it before he could feel at ease.

"Well, Chongyun, let's go and see what these Fatui are up to." Su Xun nodded, and then said, "Wait for me for a moment, I will explain the situation to Hu Tao and the others."

After saying that, he walked into the yard.

Chongyun was stunned. Is Hu Tao here too?

He couldn't help but look inside out of curiosity, and was surprised to see several girls sitting in the yard. One of them was the familiar name Hu Tao, but the others were faces he had never seen before.

Except for a strange little girl who can fly, the other two girls are surprisingly rare beauties.

Are they all Su Xun's friends? Chongyun fell into thought.

Back in the courtyard, Su Xun briefly explained the situation to the girls, and then said, "I have to go out and investigate these Fatui. You can eat first and don't have to wait for me."

Ying frowned slightly, but she knew that Su Xun was not someone who would easily fall into danger, so she just told him to be careful.

Shen He nodded silently. She knew Su Xun's strength, so she didn't worry too much.

They are just some fools, nothing to be afraid of.

But Hu Tao stood up directly and said excitedly: "Oh, this seems to be an interesting thing. Su Xun, I want to go with you too."

Su Xun touched Hu Tao's head helplessly, "Don't make trouble, too many people will reveal your whereabouts, you should stay at home."

Hu Tao refused and acted coquettishly towards Su Xun, but seeing that he refused to give in, she had to give up with some regret.

Seeing this, Su Xun did not delay any longer. He and Chongyun quickly left the courtyard and set out on the journey to the ruins.

As night fell, the stars began to twinkle in the sky, and the two of them moved forward quickly in the night.

Seeing that Chongyun was too slow, Su Xun flew up with a shocked look on his face.

Fortunately, Chongyun had seen the world, so he was not too panicked. After calming down, he pointed out the direction for Su Xun.

So the two of them sped up a lot, and three minutes later, they arrived at the ruins.

Su Xun used his spiritual power to simulate the shadow characteristics of the Shadow Power and hid himself and Chongyun before falling from the sky.

After taking a quick look around, I found that this was an ancient relic that had been abandoned for a long time, and the air was filled with an ancient atmosphere.

Among the broken walls, one can vaguely see some weathered sculptures and remaining murals, which seem to be telling an ancient story.

In the night, the ruins appear even more mysterious and quiet, with only the occasional sound of wind and the chirping of insects in the distance breaking the tranquility.

"Su Xun, the entrance to the ruins has disappeared..." Chongyun said solemnly.

Su Xun nodded. Although the ruins looked as if they had always been like this, based on his observations, this place had definitely been tampered with by the Fatui, and the entrance had been moved by them.

But this is just a small problem and it won't bother him.

Su Xun circulated his spiritual power again, then infused it into his eyes. He concentrated his mind and began to sense everything around him.

After a moment, Su Xun looked at a seemingly ordinary stone wall.

The stone walls are covered with vines and moss, almost blending in with the surrounding ruins.

But in Su Xun's vision, there was still a slight elemental fluctuation there, which was not found anywhere else but there. It would be unreasonable if it was not abnormal.

"There." Su Xun said, "The entrance should be there."

The two walked to the front of the entrance. Looking at the stone wall in front of them, Chongyun frowned, "How can we get in? Do we have to destroy it?"

"No, this will alert the enemy. There might be some Fatui guarding the entrance inside." Su Xun immediately denied it.

"What should I do?" Chongyun felt helpless. How could he get in without opening the stone wall?

"Don't worry, I have a way." Su Xun smiled slightly.

Under Chongyun's puzzled gaze, Su Xun opened his hands, and the spiritual power in his body surged out, enveloping the two of them.

The next moment, the transparent spiritual power instantly turned into darkness, as deep as night, completely covering the figures of the two.

Then, Su Xun grabbed Chongyun's shoulders and ran towards the stone wall as he looked shocked.

Just when Chongyun thought he was going to hit the stone wall, they miraculously passed through it.

The figures of the two people disappeared instantly when they passed through the stone wall, as if the stone wall was just an illusory barrier.

By the time Chongyun reacted, they had already entered the interior of the ruins.

This is a deep and narrow tunnel, dark and damp, with a musty smell in the air.

There were some broken stones and ancient statues scattered on both sides of the tunnel, and it was obvious that no one had been here for a long time.

At the end of the tunnel, they could faintly hear low incantations and the roar of mechanical operation, which made Su Xun and Chongyun feel a little unusual.

Su Xun's heart skipped a beat. He sensed an extremely strong dark force, as if it was extremely evil.

He narrowed his eyes. It seemed that the Fatui were really researching something very dangerous.

Without further hesitation, the two carefully moved forward along the tunnel, trying not to make any noise.

Su Xun's spiritual sense constantly scanned the surroundings to make sure there were no traps.

Chongyun held his weapon tightly, ready to deal with any possible threats at any time.

Suddenly, Su Xun stopped, which made Chongyun feel nervous.

Then he seemed to notice something, his eyes fixed on the front, and there were footsteps!

Not far ahead, I saw a few figures walking back and forth, as if they were patrolling.

Su Xun and Chongyun looked at each other, and then Su Xun said in a voice transmission: "I will deal with them."

Hearing this, Chongyun naturally had no objection. He knew that Su Xun was much stronger than him, and it wouldn't cause too much noise if he took action.

So Su Xun quietly moved forward and came in front of several figures.

These people were indeed some Fatui soldiers wearing uniforms and holding sophisticated equipment.

At this moment, they were looking around with serious faces, diligently guarding against any possible enemy.

However, Su Xun appeared in front of them, but they did not notice Su Xun, so it can be said that their efforts were in vain.

Su Xun's eyes flashed coldly, and as soon as his mind moved, the shadows around him suddenly condensed into several sharp black blades.

These blades were like invisible killers, silently slashing towards the necks of the Fatui soldiers.

The Fatui soldiers were subdued in an instant, their pupils dilated instantly, and then they slowly fell to the ground under the support of the shadows without making any sound.

Chongyun was standing not far away. When he saw Su Xun's actions, he was secretly amazed in his heart. Su Xun's methods were really magical. The disciples of the immortal family were really extraordinary.

At this time, after Su Xun dealt with this group of fools, he seemed to have thought of something. He slapped his head and realized that he could use the power of shadow to explore first.

Thinking of this, Su Xun directly used his spiritual power to condense several tiny black insects. As his mind moved, these insects immediately flew quickly towards the tunnel ahead.

Chongyun walked up to Su Xun and looked at him puzzledly, wondering what he was doing.

But he didn't ask because he knew Su Xun must have his plans.

Meanwhile, deep in the tunnel.

In the center of a huge stone chamber, there is a huge mechanical device. It is made of various strange metals and mysterious runes, exuding an unsettling atmosphere.

A group of researchers in white coats were busy around the device. Their movements were intense and orderly, and it was obvious that they were conducting some important experiment.

Amid the roar of machinery, a middle-aged man walked through the crowd, went straight to a corner, and bowed respectfully to a figure hidden in the darkness.

"Master Doctor, we have collected most of the demon residue within the Guiliyuan area. The device is close to saturation. Should we proceed to the next step of the experiment?"

Da da da--

There was a rhythmic sound of tapping on the table, like the sound of a clock echoing in the stone chamber. The man called the Doctor did not answer immediately, but seemed to be lost in thought.

After a moment, he slowly raised his head, his eyes looking through the dim light, the corners of his mouth slightly raised under the crow mask, his eyes holding a hint of rationality yet madness.

"Oh, it's finally time. Alexi, bring the experimental subject up here."

"Yes! Doctor." The middle-aged researcher called Alexi also had an excited and enthusiastic look on his face. After responding respectfully, he turned around and walked quickly in a certain direction.

As the doctor watched his subordinate leave, he stood up gracefully and slowly walked towards the giant mechanical device in the center of the stone chamber.

The mechanical device in the center of the stone chamber has been activated, and the surrounding light is shrouded in a huge shadow. Only the faint light emitted by the operation of the machine illuminates the surrounding environment.

The doctor came to the mechanical device and gently placed his hand on an operating table.

As he moved, the mechanical device emitted a low roar, and then the other side of the stone chamber slowly opened, revealing a cold laboratory table.

After taking a look at the experimental table, the doctor shifted his gaze to the giant machine, with an inexplicable gleam in his eyes.

After a while.

"Doctor, the subject is ready." Alexi's voice echoed in the stone chamber. Behind him, two Fatui were holding down a male subject who was chained.

The subject wore a white mask, his eyes revealed deep fear and despair. He wanted to struggle, but he could not utter a word or make any resistance.

The doctor walked up to the subject, his eyes stayed on him for a moment, then the corners of his mouth slightly raised, and he gently stroked the white mask on the subject's face.

“Are you scared? Don’t worry, this is a gift that can change your life. It will take you into a whole new world.”

After saying this, the doctor turned around and nodded to Alexei.

Seeing this, Alexei took immediate action. He unbuttoned the man's hospital gown, revealing his thin body and skin covered with black scales.

Two Fatui generals carried the experimental subject to the experimental table, fixed it firmly, and then retreated.

The doctor's eyes narrowed slightly, his fingers gently touched the mask, and then he said to Alexei: "Begin."

"Yes!"

Alexei took out a long, thin tube from the mechanical device, at the top of which was a needle that was flashing purple light.

He carefully inserted it into the subject's arm vein and pressed a button on the mechanism.

Immediately, the mechanical device began to emit a loud roar, as if it had just started to truly operate at this moment.

The madness in the doctor's eyes grew even more intense, and his gaze was fixed on the machine in front of him.

But at this moment, he seemed to have noticed something and looked in a certain direction.

"Oh? A bug broke in?" The doctor gently pointed with his right hand wearing a white glove, and a black bug hiding in the corner was immediately crushed by an invisible force and turned into ashes.

"Doctor, someone came in?!" Alexei's heart tightened when he saw this scene and he asked hurriedly.

"Don't worry, they are just two little bugs. Let me play with them." The Doctor waved his hand, stopping Alexei from letting the Fatui around him fight against him.

He sneered and looked indifferently at the entrance of the stone chamber.

"Are they subordinates of the Liyue Seven Stars? Or are they just some outlaws who want to do good deeds?" The Doctor asked with interest to the two people who were slowly walking out of the shadows.

"Hmm...it should barely be considered the second type." Su Xun smiled lightly, seemingly very relaxed, but his eyes were fixed on the doctor.

"The second Fatui executive officer - Doctor?"

"Ha, it seems you have heard of my name." The doctor sneered.

He walked down from the laboratory table slowly and calmly.

"So, what gave you the courage to be so calm in front of the executive officer? Could it be your insignificant strength?"

Listening to the doctor's words, Chongyun clenched the sword in his hand and felt an extremely strong pressure in the air, making his heart feel like it was about to jump out.

This person... has such a strong sense of oppression!

Although Su Xun was a little nervous, he was not afraid because he knew... the doctor in front of him was just a slice, not the real person!

Although the Doctor's slicing ability is also very strong, at least it won't make him feel dangerous, so he should be able to handle it.

Therefore, Su Xun just smiled and said: "Whether it is really insignificant, we still have to fight!"

He looked at the person lying on the experimental table and the machine that had already started running, and frowned.

Is this a human experiment involving injecting demonic residue?

Thinking of this, Su Xun did not delay any longer. He directly summoned out his spear and rushed towards the doctor.

The spear drew a sharp cold light and pierced the doctor's head.

Seeing this scene, the doctor just smiled slightly, then his figure flashed and disappeared on the spot.

Su Xun was not surprised. He quickly blocked the spear with his backhand. There was a clang and sparks flew.

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