When people are in a state of stunnedness, they are most afraid that the air will suddenly be quiet, and Wang Zhaolin is no exception, seeing Pei Qiu staring at the Kongyuan Sword without saying a word, he is worried that talking to the sword at this time will expose Adoris's identity. However, the doubts in his heart were like a fish in his throat, which made his expression very unnatural, and the action of retracting his sword was slightly delayed.

Pei Qiu didn't care at all, he tilted his head and asked Wang Zhaolin to act with him.

When the two of them are in the dark underground hallway, they can walk up the stairs to exit the basement, but there is still a room that has not been investigated, and it may hide the last secret of the Youkang Sanatorium.

Sure enough, the scene inside the room was indeed shocking enough: sixteen iron cages of about 1 meter were arranged in a square in the center of the room, four glass display cases were placed on the wall next to the door, and on the opposite side were a workbench stacked with chemical reagents and a long-abandoned medical equipment.

Wang Zhaolin didn't recognize what the instrument was for, but the moment he touched that thing, it seemed that an electric current passed through his body, making his hands and feet ** for a while, and it took him half a day to ease up, but his right palm inadvertently touched a "Research Notes", and he turned several pages in a row, the content is as follows:

These miners are no longer human, but they mean a lot to humans, and studying the anatomy of the Crystal Monster may unravel the mystery of the undead.

Although there were many opponents, after I explained the benefits to them, some of them agreed with my approach.

A 100-day research project on the "test subject" began.

......

On the 10th day, they tried to inject the crystal monsters with molten diamond crystal liquid to test what kind of material they needed to survive?

......

On the 30th day, they learned that the crystal monster is afraid of flames, but it can avoid injury, which is estimated to be the eternal memory left by the mine accident explosion, but other humans who have transformed into crystal monsters do not have this memory, as long as the curse continues, they will only get stronger and stronger, and people must be forbidden to enter the Purple Mist Forest from now on.

......

On the 60th day, after much experimentation, we finally found a stable way to extract the blood of the crystal monster, which I named "black blood", and once inhaled, the crystal monster will be confused, and even completely lose its free will, and fall into a state of madness.

......

On the 90th day, the decoy device can be used, and if you put "black blood" in it, you can release a large amount of smoke that attracts crystal monsters.

......

On the 100th day, Red Alert! The iron cage sealing device is losing power, and the backup is requested......

After reading the whole text, Wang Zhaolin finally understood the purpose of the instrument, and when he pressed the control button, a cylindrical vessel popped out of the groove, containing a black liquid.

"The crystal monster in the Youkang Sanatorium escaped at this time, but ...... Why didn't the researchers take this bottle of crystal monster blood?" Pei Qiu touched his chin, recalling the inscription he had seen at the iron fence, "Could it be that they had already thought of a way out before deliberately letting the crystal monster go." ”

"If they had researched more than one vial of black blood, everything would have made sense. Wang Zhaolin nodded in agreement, picked up the decoy device, shook it in front of his eyes, and added, "I suddenly have a way to destroy all the crystal monsters in the Purple Mist Forest and win the rewards of the hidden mission. ”

"Oh! ”

"We need to divide the labor and cooperate, and you will have a share of the blame. Wang Zhaolin smiled confidently, "You first put this bottle of black blood on the top of the sanatorium, activate the bait device switch, it will produce smoke and dust that attracts crystal monsters, and when the sixteen crystal monsters all attack, you cast a fire spell to turn into a wall of fire within a radius of hundreds of miles, blocking their retreat." ”

"So what do you do?"

"I'm in charge of catching those crystals until they're all in an iron cage. ”

"If you want to fight against sixteen, will the risk be too great. Pei Qiu shook his head, "If you really can't hold on, you can call me to come and help." ”

"That's fine! This scabbard is similar to your Heavenly Flask, and when I hit it with the Shadow Devouring Technique, I will definitely be able to bring those crystal monsters into nothingness. Wang Zhaolin handed the bait device to Pei Qiu and lifted the Tiankun scabbard, "You just need to cast a fire spell and try to hold them back." ”

"Okay, I'll get ready, but...... I still don't know anything. Pei Qiu took the bait device into his arms, "There are only twelve survivors of the Suhui Mountain mine disaster, how can there be four more cages for no reason?"

"Maybe those four people were employees in the sanatorium before they were born, and Ming Yuanye deliberately turned them into crystal monsters in order to seek fame and fortune. ”

"As far as I know, cannibalism is the only way for humans to mutate into crystal monsters, isn't it ......" (main suspense)

Wang Zhaolin stopped Pei Qiu with his hand to continue, after all, the whereabouts of the remaining bottles of black blood are unknown, he didn't think about other possibilities, he couldn't help but think about it carefully, they could only concentrate on dealing with the crystal monster, there were two days left in the selection competition and it was going to end, since they couldn't defeat the beast, they had to use the hidden task to get high scores, which could be regarded as removing a harm for the people.

Anyway, he has finished explaining everything, Pei Qiu is by no means an unreasonable person, and after saluting Wang Zhaolin, he turned around and walked towards the basement exit.

There are two elevators in the lobby on the first floor, the elevator on the left is completely scrapped, and only the one on the right can be used, and the power switch must be turned on to make the elevator run.

The room was a mess, with various diagnosis and treatment reports on the table, all eight monitoring devices were unusable, screen debris was scattered all over the ground, bulletin boards were hung with photos of the patient's diseased organs, and the switch box was located in a corner against the wall that required a password to open, and the clues were related to the photos of these organs.

Stitching together one of the photos of the left rib cage with the number printed on the left rib cage and the right half can get the number "706113", that is, the establishment time of Mingye Mining (Haojun) Co., Ltd.

According to the hint, this is the password to unlock the switch box, and with a violent mechanical roar, Pei Qiu looked at the hall through the window, and the elevator door opened automatically.

Pei Qiu immediately walked towards the elevator, feeling vaguely uneasy in his heart, after all, Wang Zhaolin had already investigated the first and second floors before, and the button on the third floor had already been damaged, so he could only go to the fourth floor, and it was unknown what trouble he would encounter above.

Unexpectedly, when he stepped out of the elevator, the scene in front of him was a number of rough houses without doors, the lime on the walls was seriously peeled off, and rubble, gravel, mud and other construction waste could be seen everywhere.

Next to the corridor leading to the top floor, there is a blood-stained sand filter with a group photo of four people in their early twenties, wearing hard hats, shovels in their hands, shoulder to shoulder, with a stiff expression on their faces, and an astonishing past written on the back of the photo:

On the 11th day, the pump system in the basement failed, and the dean ordered the four of us to go to repair it, and the overseer looked solemn, as if we were gone, and we would not come back.

It turned out that they were the four construction workers who had mutated into crystal monsters, and Wang Zhaolin's guess was not bad at all, and there must be other ways to turn humans into crystal monsters.

Pei Qiu took out the bait device from his coat pocket, sped up his pace and quickly ran to the roof of the building.

The top floor of the sanatorium is a relatively flat rooftop, with a chimney in the center, and the bottom interface just coincides with the bait device, obviously Ming Yuanye has already thought about its future use when he was studying black blood, so he will build such a chimney with a special shape.

There is no need for any operating procedures on site, as long as the bait device is put into the groove of the interface at the bottom of the chimney, and the button is pressed, the device will inject the reaction reagent by itself, so that the temperature of the black blood in the bottle rises sharply, vaporizes into white smoke, and disperses in the air through the top of the chimney.

Half an hour later, the smoke from the black blood spread out to a radius of hundreds of miles, and was sniffed out by a crystal monster with a sickle tattoo on its shoulder, its pupils gradually dilated, and it let out a terrifying roar, beckoning its companions to follow it in the direction of the Youkang Sanatorium on the mountain.

When the group of crystal monsters entered Pei Qiu's field of vision, he looked through the telescope on the rooftop and was surprised to find that the tattoo on the left shoulder of the leader was exactly the same as the body characteristics of someone in the group photo of the four people.

He hurriedly took out the condensation tube and notified Wang Zhaolin who was ambushed on the first floor that the crystal monster was coming, and then opened his finger to count the number of crystal monsters that broke into the sanatorium.

"What are you hesitating about? Unleash the Flame Spell and trap them!"

"That's not right...... There was also a crystal monster that had not been lured in. ”

"Fifteen of them, that's right! Someone killed one. ”

"How do you know?"

"Don't ask, cast a spell!" With that, Wang Zhaolin hung up the condensation tube.

So Pei Qiu took the Tianshi sword out of the sheath, condensed the spiritual power on the blade, and slashed towards the sky, and suddenly the flames gushed out like pillars, forming a circular wall of fire on the periphery of the sanatorium, trapping all the fifteen crystal monsters in it.

This undoubtedly drew the attention of the Crystal Monsters to the wall of fire, and they stopped running and rushed towards the wall instead, and although they were blocked by the scorching flames after several attempts, their plan would have failed if they were not introduced into the sanatorium.

Pei Qiu had a plan, picked up the condensation tube, and contacted Wang Zhaolin again.

"The smoke produced by black blood alone is not enough to lure this group of crystal monsters, I have a bold idea. ”

"What are you going to do?"

"Using the remaining black blood to drive those Crystal Monsters into a state of madness will make our roundup harder, but the only way to do it. Without waiting for Wang Zhaolin to reply, Pei Qiu hung up the condensation tube.

Pei Qiu removed the bait device from the bottom of the chimney, turned off the guide reaction button, picked up the remaining half of the bottle of black blood and walked to the edge of the rooftop, picked the hardest ground, and threw the bottle of black blood hard.

With a "crackling" sound of glass breaking, the eyes of the group of crystal monsters shifted to the front of the courtyard again, and the crystal monsters with sickle tattoos first smelled the special smell, slowly crawled in front of the black blood flowing on the ground, and leaned over to take a sip.

This mouthful instantly doubled its body, the originally dull scales became more gorgeous, the claws were more vigorous and flexible, and the rest of the crystal monsters all gathered at the edge of the black blood as if instructed to drink it down.

Eventually, all of the crystal monsters were strengthened and fell into a state of madness, and when they rushed into the sanatorium, the planks that Wang Zhaolin had placed there to stop them were smashed to pieces.