"Brought? Zong Liuyan showed a bright smile on his face, walked to Liu Chu's side, stretched out his hand to grab his shoulder, and said with a smile, "Seniors have something to do, I need your help." ”

"What's the matter? As long as I can do it, it's fine. ”

Liu Chu patted his chest and said.

"Don't worry, it's just a little thing, it's very simple. ”

Yun Qingyu answered with a smile.

Then he looked at Cheng Laosan and said, "Now you don't have to be embarrassed, the transaction changes, just tell us the approximate location." As a reward, you can get 1,000 Lower Grade Yuan Stones. Questions?"

"Nope. ”

Cheng Laosan hurriedly shook his head, but he couldn't tell whether he was happy or depressed.

The group left the tavern and headed towards the city walls.

All the way through the layers of checkpoints unimpeded, ascended to the city tower.

Liu Chu took out a large cylindrical metal box from the space ring, and there were small round holes on it, as if it was a beehive.

Then, he took out a small operating board, and tinkered with it twice, and everyone heard a "buzz" sound, and the small round holes lit up slightly, and then small metal balls with smooth and round surfaces flew out and suspended in front of them.

"The latest model of a small military multi-functional detection device, codenamed 'Sky Eye'. It can scan all targets within a radius of 200 miles, can see through most camouflage, and can break through most forbidden covers. It has a certain attack power, and can self-destruct if necessary, and the power is equivalent to the full force of a martial artist in the Transcendent Nine Heavens Realm. ”

Liu Chu proudly introduced these metal balls.

"Awesome. ”

Zong Liuyan gave a thumbs up.

Yun Qingyu said with a smile: "I heard that you also participated in the project of developing the 'Sky Eye'. He is worthy of alchemical genius. ”

Cheng Laosan, who was next to him, listened to their conversation, and his heart was already filled with shock.

"Is this the power of alchemy?"

He sighed in his heart, and at the same time secretly sighed, it was worthy of the Supreme Academy, and it was indeed a genius.

An Shiwu interrupted everyone's chat, and said with a flat expression: "Don't waste time, let's start right away." ”

"Okay, I'll let the eye out. ”

Liu Chu's fingers moved flexibly on the operation board.

"First connect with the fortress's defense system and determine the identification code of friend or foe. That's it, now it's time to let the little ones out. ”

As Liu Chu's words fell, the heavenly eyes floated towards the outside of the city tower.

"Is there an image?"

Xiao Yunlong asked.

"Yes, wait a minute. ”

Liu Chu answered without raising his head, and his ten fingers were like flying, as if he was playing a beautiful piece of music.

Shout!

A curtain of light was projected from the metal box, which was divided into grids, each displaying different images.

Liu Chu said: "After the networking is completed, I will integrate all these images. But we have to wait a little longer. ”

He glanced at Cheng Laosan again and said, "This is the direction, right?"

Cheng Laosan, who saw such high-end equipment for the first time, was already stunned, and when he heard Liu Chu's words, he came back to his senses and hurriedly nodded: "That's right, that's right, it's in this direction." ”

"Good. Now let's start networking. ”

The images on the light curtain begin to merge slowly and encompass an ever-expanding area.

"This is it, yes, that's it!"

Cheng Laosan suddenly pointed to a place on the light curtain and said.

It was a glimmer of heaven between two towering peaks, and a mountain stream flowed below.

"Is it here?"

Liu Chu clicked twice on the operation board, and the image was immediately enlarged, showing a high-definition image of that place.

"Yes, this is it. There is a cave in it, and after entering it, there is a secret passage that leads to the depths. It was in that secret passage that we encountered the black air. ”

Cheng Lao Sandao.

"Okay, let's send a Sky Eye in to find out the situation first. ”

Liu Chu's eyes stared at the small light curtain suspended on the operation board without blinking, and his fingers were moving rapidly.

One hundred thousand mountains, high in the sky beyond the dangerous peaks that stood side by side to form a pass, a small metal ball flashed with a glimmer, and then began to lower its height and flew towards the first line of sky between the two mountains.

The metal ball flew to the foot of the mountain, and soon found the cave in Cheng Laosan's mouth.

"Start scanning!"

Liu Chu's voice fell, and the metal ball began to release invisible fluctuations that spread into the cave.

A map of the situation inside the secret passage is drawn on the light curtain.

"Shhh

Looking at the dense labyrinth of countless branches on the light curtain, everyone gasped.

"So complicated?"

Yun Qingyu looked at Cheng Laosan: "Did you encounter this maze when you went in?"

Cheng Laosan was also dumbfounded, shook his head again and again, and stammered: "No...... No, I don't. We didn't go far before we ran into the black gas and escaped. ”

"This place has a secret. Cheng Laosan: They should have just touched the surface part and were discovered. ”

Zong Liuyan touched his chin and said thoughtfully.

"Wait, give me some time. ”

Liu Chu said suddenly, and then the speed of his finger movement became faster, and he drew an afterimage on the operation board.

The image on the light curtain is constantly changing, cutting layer by layer, and the branches are chopped off one by one, and finally only a strange pattern remains.

"What is this?"

Zong Liuyan looked dazed.

"Formation!"

Xiao Yunlong's eyes were staring at the pattern.

An Shiwu's face was also slightly solemn: "It should be a formation used for sacrifices, but I don't know which one it is." ”

"It's the Nine Shadows Blood Demon Array!"

Liu Chu called out the name of this formation, and at the same time gasped: "Someone has laid such a vicious formation here. ”

"Huh, do you know this formation?"

Everyone turned their attention to him.

Liu Chu's face was a little unsightly, and he said, "When I was studying in the academy, a tutor talked about this formation. The Nine Shadows Blood Demon Great Array is a formation created by the Yin Soul Clan and the Blood Demon Clan for sacrifice. All life within the influence of the formation will be sucked dry by the large array. The flesh and blood are sacrificed to the Bloody Demon Clan, and the soul is sacrificed to the Yin Soul Clan, which can be said to be extremely vicious. ”

"You mean, a sacrifice to an entire race?"

Xiao Yunlong frowned.

"Not bad. ”

Liu Chu nodded and said, "This is also the point that distinguishes the Nine Shadows Blood Demon Great Array from other sacrificial formations. After accepting the sacrifice, the feedback is given to the roots of the entire race, not to an individual individual. It was this formation that the Yin Soul Clan and the Blood Demon Clan used to continuously improve their race. ”

After listening to his explanation, everyone's faces changed.

"What a hard work!"

Cheng Duanlong slammed his fist on the desk.

Liu Chu's face was solemn: "I suspect that there is more than one formation, if nothing else, there are many other places on the mainland." These are supposed to have been left over from the invasion of the Outer Demons. After all, this level of formation is not so easy to arrange, and after the main forces of the Outer Demons have been driven out of Cangxuan, it is too difficult to rearrange a Nine Shadows Blood Demon Great Array. ”

"Things shouldn't be simple, do you need to report to the academy?"

Yun Qingyu looked at An Shiwu.

An Shiwu frowned, then stretched out and said, "No need, the academy already knows." ”

"Huh?"

Yun Qingyu was stunned for a moment.

Zong Liuyan had already taken out his identity token and shouted, "Look at your task interface, our mission has changed." Now it's time to probe the details of this Nine Shadows Blood Demon Array and gather intelligence. But we didn't let us destroy this big array. ”

Liu Chu smiled bitterly: "This level of formation is not something that anyone can destroy. It is estimated that at least it will have to be done by the existence of the Holy Rank level. ”

"It's okay, it's okay. ”

Zong Liuyan suddenly showed a look of joy.

"But I'm a little weird. ”

Liu Chu suddenly frowned, pressed a few times on the operation board, and said, "Judging from the results of Tianyan's exploration, this large array should have been abandoned for a long time and is in a closed state. Therefore, it should not have the ability to actively attack. So what was it that attacked those warriors at that time?"

When everyone heard this, their faces changed, they glanced at each other, and blurted out two words in unison: "Ghost Gate!"

"Looks like we're going to have to go there. Yun Qingyu frowned and said, "I suspect that the people from the Ghost Gate discovered this formation and tried to reactivate the big formation. ”

"Is this possible?"

Zong Liuyan looked at Liu Chu and asked.

Liu Chu nodded: "Theoretically, it is achievable." However, if you really want to restart the big array, then you have to consume a lot of resources. Most crucially, blood sacrifices are required using a large number of intelligent lives. ”

"Intelligent life?"

Xiao Yunlong narrowed his eyes, looked at Cheng Laosan and said lightly: "Have you heard of a large-scale disappearance of people in the fortress recently?"

"Missing?"

Cheng Laosan raised his head and thought about it, and replied, "Yes!"

"Tell me what's going on?"

Yun Qingyu then asked.

"A few days ago, there were many adventurer squads that went to the 100,000 Great Mountains and did not come back, and even a large adventure group was completely wiped out inside, and none of them came back alive. I heard that a small beast tide broke out in the 100,000 mountains. The garrison has also issued a notice, asking everyone not to enter the 100,000 Mountains as much as possible recently, and wait for the beast tide to subside. ”

Cheng Laosan replied.

However, these words made several genius students of the Supreme Academy look thoughtful at the same time.

"Small beast tide?"

Xiao Yunlong muttered to himself.

"Okay, we got it. Now you can leave. ”

After a while, he said lightly to Cheng Laosan.

"This ...... Don't know my ......"

Cheng Laosan said hesitantly.

"It's your pay. ”

Zong Liuyan threw over a small bag.

Cheng Laosan opened it and took a look, only to see that there were ten medium-grade yuan stones inside, his face suddenly showed joy, and he nodded and said: "Thank you, thank you." ”

"Alright, let's go. Zong Liuyan waved his hand, "By the way, remember, don't tell what you saw today, otherwise you will know the consequences." ”

Cheng Laosan was stunned for a moment, and nodded again and again: "Please rest assured, the small ones must be tight-lipped." ”

After Cheng Laosan left, Yun Qingyu raised his hand to lay out the next enchantment, and said meaningfully: "This cliff fortress garrison army is really not simple. Hmph, I don't know if they really think so, or if they want to cover it up. ”

Zong Liuyan shrugged: "Maybe that's the result of the investigation." ”

"Then who do you want to use Cheng Laosan to fish?"

Yun Qingyu asked rhetorically.

Zong Liuyan smiled and said nothing. (To be continued.) )