The children who were taken out of the extremely cold land twenty years ago, the oldest was only five years old, and Ling Yu was only three or four years old at the time, and most of them had no memories of their childhood, and now such a vague statement actually has no reference value in the eyes of others.

Tong Zimin asked again: "What's under the fortress?" It is recorded in the book that the demon children were all sent to the fortress as slaves, and those children were plagued by demons and became food and sacrifices, and some were forced to work, where did they live? ”

Cultivators see themselves as saviors, entering the extremely cold land to destroy demons and save enslaved children, which is what heroes do. Now that the demons have no shadow, where are the demons and those innocent and poor children who are enslaved by demons?

Ling Yu replied in a deep voice, "I remember that there must be a spirit stone mine near each fortress, and the demons will only station and build a fortress in one place for mining. It stands to reason that the demon children sent to the fortress live in the mines, and when they are awake, they go to the mines, and lie down to sleep when they are tired. The demon's fortress should have an underground passage connected to the mines to facilitate the transportation of minerals. After the demons abandon a certain fortress, they will migrate to other places with the demons, and the demons who will continue to give birth to children are very important assets to the demons. ”

At this time, some of the students in charge of the investigation had already looked at all the rooms on the ground. When they reported the situation, they all mentioned a problem, strange metal pipes were installed in each room, and some of them were connected with things like lamps or daily utensils, but the spiritual power could not operate those devices, and those magic weapons probably needed to be activated by other spells.

According to the scriptures, it is true that the aura and magic of the cultivators cannot use the things made by demons.

Li Sa saw an iron box like a substation box in the corner, where there was a half-human, half-demon corpse, she bypassed the bones and easily pushed the gate box.

The entire fortress, which was originally pitch black, suddenly lit up.

The audience in the 666 live broadcast room was also eye-catching:

[The lights in this place use a normal lighting system, not spiritually urged?] ]

[The upstairs has a good eye, I see that this so-called demon fortress is similar to some of our ancient buildings, and the equipment pattern is similar.] ]

[In other words, the demons here have given up the aura energy and switched to fossil energy or some other energy source?] ]

[Why don't demons use the aura at their fingertips?] ]

[Demons don't use aura, why do they still collect spirit stones?] ]

[Where did the demons go?] It seems that something has happened here, so many corpses, is it really a cultivator who has the power to kill and destroy the demons here? ]

[It should be a demon internal fight, right?] ]

[Where did the demons that Ling Yu killed just now come from?] Looking at the bones here, it feels like they have been dead for several years, and since this fortress has been abandoned, where did the demons in the surrounding mines come from? ]

[Could it be that the equipment is out of control and caused some accidents, resulting in too many deaths and injuries to the demons here, and there was that huge monster before, so the demons had to abandon the fortress here and migrate elsewhere.] The demon that Ling Yu killed was just an unlucky ghost who was sent nearby to check on the situation? ]

[There's some truth to the speculation upstairs, the demons with their lethal weapons may have come to take out the giant monster, only to lose their lives.] ]

[The demons who were originally attached to the vicinity of this fortress also migrated elsewhere?] ]

[Will all those demons become zombies?] ]

Li Sa also has such an idea, obviously the facilities in this fortress can still be used, such as the circuit system, and the lights can be turned on by pushing the gate box, indicating that the place has not been completely destroyed after the demon leaves, and there is a possibility that it will be activated again. The demon may have also tried to reclaim this fortress, so he sent a team with lethal weapons to find the big monster that was causing trouble, but he didn't expect to be killed by Ling Yu.

As for the demons who were originally attached to this fortress, maybe they all turned into zombies a long time ago and couldn't work, and the demons didn't bother to pay attention to those zombies, so they let the zombies wander on the ice field? After all, those zombies don't go to places with abundant spiritual energy, and the impact is not so serious.

However, there are still points that cannot be figured out, since demons cannot use spiritual energy, and they cannot directly contact the spirit stone, then there are two possibilities for mining the spirit stone. One is to dig out all the spirit stones, clear out the places where there is no spiritual energy, and expand the demons' own safe place to live. Otherwise, the spirit stone can be turned into an energy source used by demons after some treatment.

Li Sa has seen spirit stones, but unfortunately she doesn't have the perverted knowledge reserves of Yao Fei'er, and she doesn't have the equipment to analyze whether spirit stones can be used as fossil energy. In short, after the spirit stone is mined, it must be stored somewhere if it is not consumed. If the cultivators can find these spirit stones, they will definitely make a lot of money if they bring them back to the inner world.

Maybe twenty years ago, such a large number of huge spirit stones were found to be divided, so that those who could not participate in the discussion were erased from their memories, so as not to leak the truth.

"How do these lights come on?" Intrigued, the students who enjoyed studying theories and innovations in magic looked around the wire from the gate.

Li Sa took a closer look and confirmed the existence of the heating system and the tap water system.

The demonic fortress is full of water pipes, and the nodes are similar to heating devices, but unfortunately the hot water supply has stopped, and it is estimated that there is a lack of energy input, and the corresponding equipment system is not working. The absence of black smoke in the chimney over there is also a sign that the machine is not working. And if the lights come on, it means that there are other backup power generation units here.

Guessing along the pipeline setting of the gate box, the backup power generation device is in the underground space.

Li Sa asked the school's leading teacher for instructions: "We want to take a look at the basement of the fortress." There doesn't seem to be any sign of living people or demons here, and there may be other valuable resources hidden underground. ”

The rooms on the ground were empty, completely different from the extravagant and bloody palaces of the demons described in the classics, so was the treasury where the demons hid their treasures underground? Seeing that there are so many corpses on the ground that no one has converged, the demons must have been in a very haste when something happened, probably many rare treasures have no time to be transferred, right?

The students were eager to try, and the teachers deliberated, leaving some of them on the upper floor to defend, while most of the rest followed the passage into the space below the ground.

Li Sa and the others entered the basement layer relatively backward.

There had already been a teacher with advanced magic skills in front of him, confirming that there were no illusion traps, and that all the facilities around him were not aura-driven operation. However, this floor is too clean, without any equipment and facilities, it is purely a huge vacant space.

Li Sa still remembered what Zhao Yin had said, the underground space of the demon fortress was probably the area where the aura was stripped away, so she specially reminded a few teachers who led the team. However, just now, everyone killed all the way from the side of the sealing wall where the aura was thin, and the confidence they had built up against the zombies made them not afraid of this matter.

There is little aura, they have all kinds of magic weapons that contain aura, and spirit runes can also improve aura in a short period of time, in short, their consciousness is unable to recognize what a space without aura is like at all.

Only players know how special this world is, and the aura that is so ubiquitous here doesn't exist in other worlds.

The second shift is the third shift on the weekend

(End of chapter)