Tianyou couldn't understand why he was able to crack the control method of the Soul Destroying Nail so smoothly, but it was a good thing after all, so he was still quite happy in his heart. As for the investigation of specific causes...... Since he couldn't think of the reason for a while, Tianyou didn't plan to continue wasting time.

The time they could stay on this island was really limited, and this huge lock demon tower only opened the first door before he found a treasure like the Soul Killing Spike, and his expectations for the next compartments naturally began to rise. Although Tianyou actually knows that it is impossible for him to get benefits in every room, after all, this is a lock demon tower and not a treasure room, but even if it is impossible to find something in every room, even if he finds any more treasures, it is a huge benefit, so Tianyou's expectations for the rooms after him are still quite high. Therefore, there is no time to waste.

In fact, the bones of the monster itself are also an important treasure for the people in the Xianmen, especially when refining and making weapons, the bones of high-level demons can become a good basic material. But the monster in front of him has no demon power, and it is obviously not a demon clan, so this huge skeleton has lost its most important value.

After receiving the Soul Destroying Spike, Tianyou exited the first compartment. The relief doors that were originally included in the walls on both sides began to slowly slide out and close as Tianyou left, and the glowing spell marks on the walls in the compartments inside the door gradually dimmed as the door closed. Although a thousand years have passed, this compartment can still operate independently, which shows how much attention Heavenly Court attached to this Demon Suppression Tower at the beginning.

With the experience of the first door, Tianyou easily passed the inspection process to open the second gate, and then unsurprisingly saw the huge secret room and the gradually lit spell mark again.

Unlike the first chamber, there were no Soul Spikes in the room in front of you, only a few thick chains extending from the walls, and then locking up a huge pile of white bones.

The white bones looked a little scattered, and Tianyou didn't recognize what it was at first, but he quickly understood. This is supposed to be the white bones of a snake that has been rolled up after death, because the body is rolled up before death, so the bones are piled up together after death, so that they have no shape and cannot be distinguished at a glance.

The snake bone is very large, and although it is not as exaggerated as the thing in front of it that is suspected to be an alien monster, it is not comparable to ordinary creatures. In front of it, the Titan Python is just a small earthworm. With a body length of more than 1,000 zhang and a skull the size of a small mountain, it all indicates that this is a super giant creature, and the faint demonic power escaping from it proves that it was born - a demon race.

"It turned out to be her. The voice of the moon shadow in Tianyou's mind made him stunned for a moment.

"Do you know?" asked Tianyou as he looked around the massive skeleton.

Moon Shadow was probably stuck in a memory, and it took a while before she replied, "We were very good friends until she fell in love with that guy." ”

"That guy?"

"The little white face of the immortal clan is mediocre, and his ability to deceive girls is not weak. ”

What Moon Shadow said was obviously gossip before the Great War of All Races, but Tianyou was not a particularly gossip person, and his mind was not here now, so he didn't continue to ask, but simply studied the situation in the room, and after confirming that there was nothing worth looting, he directly exited the secret room and moved to the next room.

The rooms in the back are actually similar to the ones in the front. This is the Lock Demon Tower, like a prison for the immortals. On both sides of the simple passage are single rooms, in which the immortal clan will not be able to kill the big demon for a while. After all, the demon clan is different from the immortal clan, they cultivate the body first and then the soul, so all the vitality is strong and terrifying. Even if you are defeated and caught, it is difficult to actually be killed. Calculations kill, and it's hard to die. Just like the original Cangming, the corpse bones have been lying in the Falling Heaven for so long, but because Tianyou passed by nearby and brought in a little demonic power, he immediately jumped up and cheated the corpse.

Therefore, it is extremely difficult for the demon clan, especially those who have cultivated to a certain realm, to completely kill it.

In the face of these demon clans who can't die, and they can't die if they die, the easiest way the immortal clan can think of is to throw them into the lock demon tower. First trap them, suck them dry, and then use the formation to continuously wear and erode their demon bodies and demon souls, after thousands of years, one day they can completely destroy these giant evils. This is also the reason why the Immortal Clan is so keen on building the Lock Demon Tower. It's not that they like it, but they can't help it.

Tianyou shuttled back and forth in the corridors, inspecting the "small rooms" where the demon clan was imprisoned one by one. This process is almost like visiting a paleontological museum for Tianyou, and he also has Moon Shadow by his side as a narrator, who can explain to him the situation of most of the monsters he sees. Of course, there are also existences that Moon Shadow doesn't know, after all, Moon Shadow is just a knowledgeable demon clan boss, and he is not a jack of all trades, so it is impossible to see all demons. Moreover, Moon Shadow's current memory recovery is not 100%, and there are still some missing blank areas, but the proportion is not large.

Continuing to inspect these rooms, Tianyou soon found something of interest in the first few rooms.

The room was actually quite far from the entrance of the passageway, and the mural outside the door was a little strange. It was a group of immortal clan members who were covered in blood and wounds, and at first glance they were members of the immortal clan who had just experienced a life-and-death battle. Of course, the murals were carved by the people of the heavenly court themselves, and the ancestors in them were naturally carved quite heroic and handsome. Although there are blood stains and scars all over his body, he doesn't look embarrassed, but adds an iron-blooded temperament, which makes people feel very handsome.

However, the biggest strangeness of this relief mural is not the question of whether the person on it is handsome or not, but the painting itself - there are no monsters.

From the entrance, Tianyou had already made all the way to at least twenty or thirty compartments. He would take a look at the relief murals outside these compartments first, because he had confirmed from the first and second compartments that the frescoes at the entrance were depicting the monsters imprisoned in the room. Although some of them are pictures of fighting monsters, and some of them are after they are killed, they will definitely appear in the mural regardless of whether the monster is dead or alive, and it usually appears as the main body.

Tianyou guessed that this kind of mural was not a simple decoration, and it may also have the function of a catalog, so that it is convenient to find the corresponding monster without having to open the door every time to check it.

However, although the mural in front of me looks very much like the battle process rather than after the war, because the immortals in it are still in a fighting posture, but in the center of the picture there is a vacant space for the boss, and there are no monsters painted. It looked like the group of immortals were wrestling with the air.

"It's ...... Invisible monsters?"

Tianyou is not stupid, and after watching it for a while, he thought of a certain possibility.

It's impossible for the members of the Immortal Clan to pose somewhere to do nothing, so there must be monsters in the picture. But in reality, there is really a large blank area on the mural, and nothing is carved. This shows that the monster actually appears in the mural, but it is just invisible.

It is not uncommon for a demon to be invisible, and many demon clans will have stealth techniques, especially at this level where they need to be locked in the lock demon tower, it can be said that there is almost no one who can't do this trick.

However, stealth is only one type of technique, and it can be recognized. And in addition to the fox clan's illusions, most of the monsters' stealth techniques are not particularly good for the immortal gate, that is, they can play a role in a sudden attack when the other party is unprepared. When they really know that the other party is invisible, the immortal clan has many ways to make the other party explicit or directly see the other party.

There is no monster body in the mural in front of him, which means that the stealth technique of this monster should be quite strong, so that Heavenly Court retains its stealth characteristics when making the catalog mural.

With some curiosity, Tianyou opened the door to this mural. After the same detection process as before, the door opened, and the curse mark gradually lit up, and then Tianyou was stunned.

"Empty? Did you run away?"

"No, look at the chains. ”

Moon Shadow's reminder draws Tianyou's attention to the pile of shackles in the middle of the room. One end of these shackles is attached to the surrounding walls, floors, or roofs, and the other end is a ring of various sizes, which is supposed to be a device used to hold the monster's body in place.

However, the shackles here are now mostly spread out on the ground, and nothing can be seen locked by them. Moreover, the room itself is also very strange. It wasn't as big as the rooms in front of it, but it was like a normal room size, only a few dozen square meters.

The shackles that Moon Shadow had drawn to Tianyou's attention were in the middle of the room to the left, where there was a shackle, and although the iron cables behind it were all stretched to the ground, near the shackle ring, there was a chain that was strangely raised, forming a small arched bridge, and the bottom was completely empty.

Unless something like a chain is straightened, it is normally impossible to stand up. But the chain strangely formed an arch on the ground. That's weird.

Tianyou, who was going to study what was going on, had just stepped into the room when he suddenly felt something under his feet and slammed forward. Fortunately, the monk's body was already strong, and he also belonged to the kind of motor nerves that were particularly developed, so he instinctively took a step forward to stabilize his body.

Looking back in confusion, there was nothing to be seen on the ground.

Without hesitation, Tianyou immediately thought of his previous guess - this monster is invisible.

Almost instantly, Tianyou jumped to the door, regardless of his posture, and rolled into the corridor on the spot. The door behind him slowly moved and closed as he went out, and the light of the spell gradually dimmed. However, Tianyou's heart was full of doubts.

Stealth is a kind of technique, a technique that needs to be used. No matter how good this monster is at stealth, it still maintains stealth after death. And even if it does, how many years has it been? Could this stealth be indefinite? Obviously, this speculation is unlikely to come true.

If invisibility can't be maintained after death, then the current situation can only be explained in another way - the thing is not dead.

Tianyou just made a judgment, but he was suddenly stunned.

"Moon Shadow. ”

"Huh?"

"The stones and spell marks around here absorb demonic power, right?"

Moon Shadow affirmed without thinking, "Yes." The ultimate goal of the Demon Lock Tower is to squeeze the big demon out of it by continuously absorbing the demonic power, and then make it completely extinct. ”

"That'...... How did that guy in there use his magic?"

Since stealth is a spell, it must require energy such as demonic power or spiritual power to maintain. The function of the Demon Lock Tower is to limit and absorb the demon power, so as to ban the monsters in it. If the monsters locked here can still use witchcraft at will, then how can they be sealed?

Moon Shadow also only reacted, obviously stunned for a moment.

"This ......"

Moon Shadow didn't know how to answer, and Tianyou was just as confused.

Stealth cannot be maintained for a long time. Using invisibility requires demonic power. The Demon Lock Tower will drain all demonic power. It's all very basic, but there is a conflict between them. This suggests that something has gone wrong in the previous speculation.

Existence is reasonable.

This monster is still in a state of invisibility, which means that it can achieve invisibility. However, Tianyou can't find this truth at present.

After thinking about it, Tianyou returned to the door. The reason why he reacted so much before jumped out was because he thought the monster was still alive and was worried about being attacked. After all, what can make Heavenly Court waste a room seal will not be ordinary goods. If the guy inside really intends to be unfavorable to Tianyou, he obviously has no chance to resist. So Tianyou's first reaction at that time was to run out first. But calm down and think about it, if that guy really has the ability to hurt Tianyou, I'm afraid he would have done it a long time ago.

Take a step back. This is the Heavenly Court's Lock Demon Tower, which is a prison specially designed for the demon clan. It's impossible to get out of being locked up here. So when Tianyou thinks about it now, he feels that he was a little overreacted before.

After confirming with Moon Shadow again, and making sure that it was impossible for the demon clan to have any counterattack ability in the Demon Lock Tower, Tianyou opened the door again.

didn't rush in, Tianyou, who was standing by the door, first observed the situation in the room.

The small room has nothing but chains, so it can be said that it is clear at a glance. It is impossible not to see unless it is an invisible object.

Tianyou concentrated on observing the place he had just stepped on, and it was indeed impossible to see any traces. Looking at the anomaly of the chain pointed out by Moon Shadow before, you can still see the abnormal arch of the chain, as if it was on something, but in fact, there is nothing underneath, at least with Tianyou's eyesight, you can't see anything.

After thinking about it, Tianyou still didn't rush in, but took out a bundle of short sticks from the worry-free bag. This is actually a fishing rod prepared by God for camping, each section is only one and a half feet long, but as long as the connecting pipe is enough, it can be connected infinitely. Of course, Tianyou can't carry countless connecting pipes with him, in fact, he only has eight connecting pipes, which can connect 9 one-and-a-half-foot-long bamboo sticks to form a long bamboo pole. However, this time it didn't take that long, and Tianyou only connected four bamboo poles.

Cautiously poking the bamboo pole into the room, he tested the place where he had stepped on something before.

The eyes obviously didn't see anything, but the feedback from the bamboo pole in his hand clearly told God that the bamboo pole had stabbed something. Although he was surprised for a moment, Tianyou's nervousness dropped instead, because the feedback from the bamboo pole showed that this thing would not fight back because of the touch, but would only be tossed back and forth with the power of the bamboo pole.

After carefully trying a few more times with a bamboo pole, Tianyou was roughly sure that what he had encountered was something similar to a wooden stick, which should be only about three inches long, not very large. Carefully scratched a few times to move this thing in front of him, and then Tianyou directly groped for it and picked it up.

The first thing I felt was that it wasn't cool, it felt like dry wood. It feels hard to the touch and has a relatively smooth surface. The shape is a little strange, the main body is probably a cylinder, but there are four protrusions on the outside that resemble shark fins, but the tips of these protrusions are not sharp, but rather rounded.

"I really can't see it at all!"

Moon Shadow used Tianyou's eyes to observe the object in Tianyou's hand simultaneously, although Tianyou did hold such an object in his senses, Tianyou's eyes still couldn't see anything. This feeling is very strange, you must know that even crystal glass, which is extremely transparent, can also see its refraction of the air. But this thing in Tianyou's hand is really invisible at all, of course, it may also be because the light in this lock demon tower is not very bright. But even so, being able to do it at such a close distance is still completely invisible, which is really quite impressive.

"Moon Shadow, could this be the monster's bones?"

Although the shape of the hand is strange, thinking of the current situation, Tianyou still has a guess at the first time. If nothing else, this is likely to be a part of the monster's body, most likely a piece of bone. After all, the mural outside has shown that this is a monster that is extremely good at stealth, and only the bones of the monster were seen in the previous cell, so it is not surprising that the monster here should only have bones left. It's just that unlike the previous monsters, its bones are more special, and even if the main body has been dead for so long, it still remains invisible.

Moon Shadow didn't answer Tianyou's question immediately, but fell silent, until Tianyou asked her again, and then suddenly said, "Maybe it's not to keep it." ”

"What did you say?"

"The bone. Moon Shadow took the initiative to control Tianyou's body, making him turn his head to look at the thing in his hand. Of course, in fact, God bless can't see anything.

"What's wrong with these bones?"

"Bones. Moon Shadow re-emphasized, "Maybe it's not that the stealth ability has been retained, but it's just like that." ”

"That's what it is?" you mean...... "Tianyou suddenly understood. "You're saying this monster is invisible?"

Moon Shadow affirmed, "That's right. Stealth may not be its ability, but its original state. This could be a special kind of demon that I didn't even know about. Stealth is not its ability, but it is inherently invisible. ”

Tianyou stared at the empty palm again in surprise, "So even if it's dead, it's still invisible." Because it's not a capability, it's an inherent state?"

After figuring out the key, Tianyou found that his mind was also suddenly enlightened. If this monster is invisible, then it naturally has no need to maintain its own state. It's like for most land animals, if you want to stay on the surface, you have to keep paddling, and if you stop, you sink to the bottom. But for a duck, floating is its inherent state. Even if the duck fell asleep in the water, it could not have sunk underwater.

It's the same thing. The monster sealed in this prison is inherently invisible, and it doesn't have to bother to maintain this state at all.

"There is such a magical species in the demon clan?"

"When my demon clan was prosperous, there were hundreds of millions of races, and some strange species were nothing, right?"

Tianyou shook his head and didn't say anything more, but walked back into the stone room.

Moving cautiously, Tianyou continued to explore the ground with the bamboo stick in his hand like a blind man, roughly determined the position of the bones, and then groped a little bit, and soon touched the general shape of the monster.

Judging from the results of exploration, this monster has a human-like head, which is not completely certain because it is invisible, but it should be no different from a human skull. In addition, the teeth of this monster are actually similar to those of humans, and it does not have a mouthful of sharp teeth, but the four canine teeth are more prominent than those of humans, but they are not particularly obvious.

Under the skull, Tianyou felt a structure similar to a spine, but the length was amazing, it was nearly two zhang long. What Tianyou stepped on before was the end structure that extended down the spine. Tianyou guessed that a large part of the back was the tail, which is why it was so long. After all, the overall size of this thing is not too large, and there is no reason why it has such a long vertebrae.

In addition, the monster does not seem to have legs or a pelvis. If you refer to the structure of a human being, you can feel the obvious ribs and ribs down the cervical vertebrae, and then there are 6 arm-like structures around the ribcage.

These six limbs have a structure similar to that of a human arm, but have an extra joint than a human arm, which means that its "arm" is three-folded. In addition, there is no structure such as a palm at the front of these six arms, but a sickle-shaped structure grows. Judging by its sharp edges, this may not be an endoskeleton enclosed under the skin, but something like a bone blade or claw that is completely exposed.

Continuing down from the thorax section, there is only one spine left, which means that the waist of this thing starts to look like a snake's structure.

Tianyou roughly integrated the force in his mind according to the results of his exploration, and then reacted in surprise: "Isn't this Nima Naga?"

"What is a Naga?" Moon Shadow obviously didn't know what a Naga was, after all, this was a fantasy creature created in the cultural works on Earth, not to mention the Divine Continent, there was no such thing on Earth.

According to the fantasy works on Earth, Naga should be a fantasy creature with a human body and a snake tail and two to eight arms. In some works, the naga is only female, but in others there are male individuals. As for other abilities, the settings in each work are also different. However, the Naga are generally considered to be highly intelligent and adept at fighting at close to medium range, making them a fairly powerful species.

However, the pile of bones in front of him is obviously a little different from Naga's setting. The main thing is the invisibility of this thing and the bone blade at the tip of the six arms. Although Naga has many arms in the fantasy setting on Earth, there is no such thing as a bone blade, but a human-like palm. The main thing is that Naga doesn't seem to be good at stealth, at least not in most of his works.

Not knowing how to explain it, Tianyou can only tell Moon Shadow that Naga is a kind of Western Regions monster he had heard about before. He wasn't sure about the exact information, but he knew that the monster looked a bit like the Naga he had heard.

In order to confirm what this thing looked like, Tianyou simply took out a bottle of ink from the Qiankun bag and sprinkled it on the ground.

Although the bones of this monster can be invisible, they can't make the things around it invisible. After being covered in ink, the ink outlines the shape of the bones, although they are still invisible.

With an intuitive appearance, Tianyou feels that this thing looks like Naga even more. A skull almost indistinguishable from a human, an extra-long spine, a human-like ribcage, and six arms with bone blades. These are now manifested.

"How's it going? Are you sure it's the kind of monster you've heard about?"

Tianyou shook his head. "It's like, but it shouldn't be. Naga doesn't have this strange arm, and doesn't seem to have this stealth ability. But the rest of the parts are really similar. ”

"Maybe it's the type of evolution after the level of demonic power is raised. ”

Although there is no Darwin in the Shenzhou Continent, the word evolution is very common. In fact, unlike the concept on Earth, the evolution of the Divine Continent is basically a special monster.

Because the growth process of the demon clan basically starts with strengthening the body, there is a high chance that the body of the demon clan will mutate. Moreover, it is different from disordered mutation on the earth, and then through natural selection to eliminate inappropriate mutation directions. The mutation and evolution of the demon race seems to be affected by individual thoughts, and it is an evolution with a certain direction.

For example, if a monster has been expecting to carry poison, then if it mutates, it will most likely develop the ability to poison. Of course, what kind of toxin it is, and how it is implemented, is a completely random event.

If this monster is really a Naga, then according to the evolutionary characteristics of the demon race in the Shenzhou Continent, if this Naga has always expected that it can be invisible, then it is really possible for it to evolve in the direction of invisibility when it mutates. And judging from the current situation, if this guy really came here like this, then I have to say that its evolution is quite successful.

Imagine a completely invisible assassin with six bone blades, able to glide silently across the ground. What a terrible kind of existence that would be.

Tianyou suddenly understood what was going on with the mural outside. In the face of such an assassin who was completely undetectable, it was not difficult to understand the scars on the body of those immortal members. Even eighty percent of that mural is a product of serious PS. With the ability of this monster, it is impossible for those immortals to be as simple as just having some wounds on their bodies. They must have died a lot before they finally caught this monster. And for the sake of face, Heavenly Court did not carve the dead into the murals, but only made some wounds for the rest that did not seem too serious to show the fierceness of the battle.

"Hey, what's that?"

Tianyou was imagining how far the mural outside could be from the truth, but he suddenly remembered the voice of the moon shadow in the sea of knowledge.

Although Moon Shadow can only perceive the outside world through Tianyou's senses in the possessed state, unlike Tianyou herself, Moon Shadow is an independent consciousness, so although the picture she and Tianyou see is the same, the focus of attention can be two at the same time.

Just now, Moon Shadow noticed the attack on the picture that Tianyou didn't pay attention to, and Tianyou also found that thing after hearing Moon Shadow's prompt.

It is a piece of remains that has not been found before, and it is slightly away from the main body. If it weren't for the ink that Tianyou had spilled out accidentally getting on this thing, Moon Shadow might not have noticed it at all.

In fact, this thing is just a drop of ink that has been splashed, and most of the structure is still invisible and cannot be seen. Tianyou also picked it up in the past and confirmed that it was actually a sphere, and it was very rounded.

"Could this be a demon pill?" Tianyou asked Moon Shadow with some uncertainty, as he didn't feel the slightest demonic power on it. "It can't be a stone, right?"

./1_

.。 m.