Because of its astonishing size, the Abyss of the Brain Cave is not so much a huge void as a cliff that extends infinitely downward for the life that enters it.

After all, the other end of the abyss was actually shrouded in layers of black mist.

All Su Mu and the others could see was the plank road and flying rock on the side.

The Abyss Exploration Group, which is composed of the elites of the three major academies, although they are separated by their own academies, but in terms of caution about going deep into the abyss, everyone tacitly maintains each other's cooperation.

The Northern Academy of Magic, which is known for its magic, has naturally used all kinds of exploration magic to ensure that the road is safe.

The Imperial Qinghua Academy, which is dominated by knights, is at the forefront of the team, acting as the vanguard of the entire team, and always guarding against the crazy raids of the abyss monsters.

As for the Lanxiang Karakuri Academy, which is responsible for transporting the baggage, they are constantly comparing and recording the abyss in silence with their own highly militarized management.

Strive to figure out the ...... as quickly as possible What extent has the abyss changed!

And with the deepening of the exploration group, in fact, the figure of Su Mu and his party should have already fallen into the eyes of the remnants of the abyss.

Whether it's the sub-demons who live at the edge of the abyss, or the hunters who stay in the shallow abyss, or even the frost moon elves who live in the shallow abyss.

In fact, most of the remnants of the abyss are not difficult to find the traces of Su Mu and his party.

"In fact, the exploration of the abyss by the three major kingdoms of mankind is not unfamiliar to the remnants of the abyss. After all, in the thousands of years since the three great powers confirmed their alliance, humanity has been conducting a new round of exploration every three years, and the remnants of the abyss have obviously long been accustomed to human intrusions. ”

As the team went deeper and deeper along the natural plank road, the road that was walking side by side with Su Mu naturally explained to Su Mu subconsciously.

"And more importantly, as we've discussed before, the Remnants of the Abyss, due to their internal complexity, simply can't launch a large-scale attack on the Exploration Mission. As for the attack of a single clan, for the elite students of the three major academies, those remnants of the abyss are not our opponents at all. ”

So the exploration of the abyss has formed the current situation...... Most of the Abyssal Remnants will not easily contact us, and as the Abyss Exploration Group itself, they will try their best to avoid the Remnant's sphere of influence. ”

Lu Xi said as he looked at the densely planted flying rocks.

Obviously, those places with alien plants can also attract the permanent residence of the Abyssal Remnant. And like the barren plank road under the feet of Su Mu and others, in fact, even the remnants of the abyss will not entrench here.

......

However, at the moment when Lu Xi's words fell, among the Imperial group at the forefront of the team, someone suddenly inspired a blatant thunder.

With the tall and majestic Faraday Tower of the God of War, standing proudly in the black mist of the abyss, an abyssal monster that seemed to be put together at random was directly cut in two by the blade covering the thunder.

At this moment, through the black mist above their heads, Su Mu and the others could even see clearly what was beyond the abyss, and they could still hear the wind outside the abyss.

However, it was here, in such a relatively safe area under normal circumstances, that the abyss monster had already appeared in front of Su Mu and his party.

"The distribution of abyssal monsters...... It seems to be much more dense than normal!"

An obvious conclusion, I don't know from whose mouth it fell gently, and along with this conclusion, it was the deep concern of everyone about the disaster.

If it is only in such a shallow area that the abyss can already detect unusual changes, then I am afraid that everyone will be subconsciously worried about what kind of great changes are taking place in the depths of the abyss.

"Everyone speed up, the shallow abyss is also of limited reference value after all, and we need to strive to pass through the shallow abyss in one day and go directly to the root area of the problem. ”

Maggie, the Holy Daughter of the Papal States, quickly said that the plan had been decided a long time ago.

In the face of the investigation of the Abyssal Tide, neither the dark intentions of the Empire nor the intention of the Federation to convey to the Remnants of the Abyss are so imminent.

So the exploration group that killed the first abyss monster in an instant has now increased the speed of action again, and between the ancient plank roads on the abyss rock wall, it is more rapidly swept towards the depths of the abyss.

......

However, just as the diameter of the Brain Hole Abyss is vast, compared to the Lost Abyss that was divided, the Brain Hole Abyss is undoubtedly dozens of times deeper than that replica.

"The distance of thousands of meters near the entrance of the abyss is actually all the range of the shallow abyss. And due to the staggered and complex rock walls of the abyss, this shallow space of several thousand meters vertical is undoubtedly extremely huge. Even if the exploration group is composed of elites from the three major academies, it must continue to move forward without stopping, so that it is possible to successfully cross it in one day. ”

As Lu Xi explained, in the face of such a completely vertical rock wall, it was obviously impossible for the exploration group to jump down directly, and could only move forward along the twists and turns of the plank road.

Therefore, the seemingly short distance of several thousand meters, in the continuous detours and staggering of everyone, will undoubtedly increase dozens of times, and finally turn into an extremely long journey.

And as Su Mu and his party continued to deepen, the probability of encountering abyss monsters in the exploration group also increased to an astonishing degree.

So much so that when today's exploration group successfully penetrated to a depth of nearly a thousand meters into the abyss, the Qinghua Academy, which was originally a pioneer, put forward a proposal that the pathfinder needs to be replaced:

"The number of abyssal monsters is far beyond imagination, and the three deans can't make a casual move in the shallow abyss because the Qi energy realm is too high. Therefore, if we want to continue to move forward, we must let other houses temporarily replace us, and let our side prioritize replenishing their own consumption. ”

After a high-speed advance, Yang Zimu, who is the representative of the empire, has already come to the other two colleges, and unabashedly reveals that the empire needs to be replaced and rested.

Although this level of consumption is undoubtedly far from reaching the true upper limit of the Qinghua people.

But in this mysterious abyss full of unknowns, it is obvious that no one will easily push themselves to the extreme, so the proposal that Yang Zimu said at this time is indeed a reasonable plan.

And the most critical factor is actually as Yang Zimu said...... Although the Brain Hole Abyss itself is not as unstable as the Lost Abyss, it can also accommodate the random entry of big-character powerhouses. However, the corresponding condition is that, at least in the shallower abyss, the big-character powerhouse is simply not able to exert all his strength.

Otherwise, under the interference of that huge Qi energy, just as Su Mu had seen in the abyss of abandonment, the remains of the monsters that had been killed for thousands of years would also be awakened again by the majestic Qi energy in an instant.

The strange rules that exist in the abyss of the brain hole determine the danger of this place from the beginning.

No matter how powerful an individual is...... You can't do it just right!

......

"Then the three parties will take turns to open the way...... Although the teams of the Papal States and the Federation are also dominated by spellcasters, if the opening of the path does not last long, we can barely take over as the pioneer temporarily. ”

Hearing Yang Zimu's proposal, Maggie agreed to this proposal without hesitation.

As the real decision-maker of the federal side, Su Mu obviously confirmed the feasibility of the plan immediately, and quickly added:

"In this case, then the Academy of Magic will take over from the Empire as the second group of pioneers, and after our Academy of Magic has also been consumed, we will continue to change the side of the Papal States. ”

In the abyss of time comparable to life, naturally everyone has no leisure to talk nonsense.

Now that the plan has been confirmed in an instant, Su Muxi immediately led the people of the Magic Academy to quickly take over the position of the leader of the imperial side, and directly became the second group of people to open the way.

And as Maggie said, in the teams of the Federation and the Papal States, it is undoubtedly the casters who make up the majority. And the caster himself, who is relatively weak in melee ability, is obviously extremely unsuitable to explore the path with his body.

Therefore, as the only two melee fighters on the federal side, Su Mu and Mao Nier could only walk in the forefront without hesitation, providing a barrier for their companions behind them with their bodies.

However, at this moment, with the abyss exploration group moving at a high speed again, Su Mu himself finally realized Yang Zimu's previous worries.

The frequency of the appearance of abyssal monsters undoubtedly greatly exceeded Su Mu's expectations. Coupled with the high-speed movement of the exploration team, the probability of encounters between the two sides is constantly increasing. So under the superposition of the two, Su Mu actually walked forward for a few minutes or so, and he would inevitably encounter a new abyss monster attack.

And with such a high frequency of battles, even if the abyssal monsters in the shallow area were not very powerful, they still made Su Mu and Mao Nier a little tired to deal with.

If it weren't for the fact that behind Su Mu and Mao Nier, there were still many elite mages, who were constantly providing strong magic coverage, and at the same time, layer upon layer of buff spells were also applied to Su Mu and the others...... I'm afraid that just maintaining the current speed will already consume a lot of Su Mu and Mao Nier's Qi energy.

Even so, after about two or three hours of rapid walking, Su Mu was even more keenly aware of the mental exhaustion of everyone in the academy.

So I could only do not hesitate to put forward the same request to replace the pathfinder!

......

"The abyssal monsters are still becoming more dense, and I'm afraid that even if we switch to the side of the Papal States, the time they can hold on will be shorter. ”

Or ...... After the Papal States are unable to hold out, it seems that we can only slow down the pace of our advance!"

Su Mu, who was replaced at the back of the team again, had undoubtedly personally felt the astonishment of the abyss.

Even if it is the top group of young elites in the entire continent, in today's abyss of brain holes, it is so difficult to even move forward at a simple pace.

And at this moment, everyone has only reached the shallowest area of the abyss.

Su Mu didn't even have to think about it to understand...... In those deeper abyss, what dangers await the arrival of the exploration team.

And what happened next was exactly as Su Mu had predicted.

After holding out for less than two hours, the Papal States also asked for a rest, trying to replace the Empire as the vanguard.

However, in this situation, the Imperial side undoubtedly did not get enough rest at all, and naturally rejected the Papal State's proposal without hesitation.

Therefore, under the premise that the three parties were unwilling to consume too much, the speed of the exploration group going deep into the abyss of the brain hole could only be quickly slowed down to a degree that was visible to the naked eye.

Including the three deans of the three major academies themselves, in the face of the strange rules in the abyss that are completely different from those of the mainland, it is obvious that no one can use pure strength to violently break through. Therefore, in the face of a huge number of abyss monsters, the exploration team could only slow down and continue to go deeper relatively slowly.

......

"According to the rough records of the alchemy instrument, we should have reached a depth of two thousand four hundred meters in the abyss, and even if the current speed of progress is forced to slow down, it is still approaching the end of the shallow area. ”

As the three deans of peak combat effectiveness, they naturally have to pay attention to the safety of the entire team at all times, and they are undoubtedly not as leisurely as people imagined.

On the contrary, Su Mu, Maggie, and Yang Zimu, who were the representatives of the students, chose to get together with each other after their marching speed slowed down suddenly.

In the matter of exploring the abyss, the three parties undoubtedly maintained their due sobriety.

And at this moment, as Maggie, who holds the miniature alchemy instrument, has already made the depth of the abyss today, the next sentence she said next was even more abrupt:

"But compared to the changes in the abyss that we had anticipated for a long time, the question that worries me more now is...... Something that should exist in the shallow area is not in front of our eyes as promised. ”

When Maggie said this, Su Mu and Yang Zimu obviously understood what she was referring to in an instant.

Although along the way, the exploration team did deliberately avoid encountering the remnants of the abyss, neither passing through the flying rocks where the remnants gathered, nor taking the initiative to approach the buildings of the remnants. But if that's all there is to it, you won't even meet a single remnant of the abyss, and that's probably not just a matter of avoiding it.

And at this moment, seeing that Su Mu and Yang Zimu had already understood what they were saying, Maggie continued to guess in depth based on this strange phenomenon itself:

"Judging from the previous exploration experience, although the exploration team and the abyssal remnants do not want to interfere with each other, unexpected encounters between the two sides are inevitable. ”

"However, now that our group is almost out of the shallow area of the abyss, we still haven't encountered even a single remnant of the abyss who went out hunting, which is undoubtedly an absolutely unreasonable thing. ”

"Even further, the reason why we have encountered such a large number of abyssal monsters since we went deep into the abyss. Is this due to the increased frequency of the birth of monsters themselves, or is it simply due to ...... Their original hunters are gone?"

......

Maggie's speculation, while seemingly extremely bold and frightening, seems to be the only theory that can explain the current situation.

Before the exploration of the abyss really began, no matter which of the three kingdoms were, it was clear that they had already observed the movements of the abyssal remnants from the feather ship.

And since none of the three kingdoms had found anything unusual in their previous observations, it naturally explained ...... At least the remnants who live beyond the abyss, they have not undergone any noticeable changes.

In other words, the remnants of the abyss, who originally lived in the shallow area, have not only disappeared in this area, but have not migrated outside the abyss in large numbers. It was as if it had disappeared out of thin air, and suddenly ...... from the space in which it had lived Completely lost traces. ”

Based on Maggie's conjecture, there is no doubt that even Su Mu himself, who summarized it, also felt that it was so bizarre.

However, the facts in front of everyone's eyes repeatedly reminded the three of them of the possibility of this absurd conclusion.

"Immediately approach the ghetto of the remnants and check for any traces they have left. ”

Almost in unison, while this speculation was taking shape little by little, an act that should not belong to the abyss exploration sounded in the mouths of Su Mu and the three of them at the same time.

And of the three people who made this decision at this time, obviously none of them were hesitants.

So just as the words fell, with the eyes of the three of them confirming each other, the three of them had already returned to their own camps, and the resolution was conveyed in an instant.

In fact, the current Abyss Exploration team is indeed a bit weird.

As the three college deans at the pinnacle of combat effectiveness, they all chose to be silent, and even the three academy instructors who accompanied them also delegated their power to the students themselves.

So whether it is Maggie who has the identity of a saint, or Yang Zimu who has the blessing of the emperor's will, or even Su Mu, who secretly included all the students in the private alliance.

The real decision-makers of the three academies are instead the three extremely young academy students.

Therefore, at this moment, under the joint resolution of Su Mu and the three of them, the latest opinion that the three of them had just reached an agreement on was quickly implemented.

The exploration group, which had deliberately avoided the remnants' settlements, was now rapidly approaching the flying rocks covered with strange vegetation, and directly stepped into the living space of the remnants.

And with the rapid progress of the exploration group, the next facts that happened in front of everyone's eyes were obviously as expected by Su Mu and the three of them at the beginning:

On top of a large flying rock, it is clear that it was once inhabited by remnants.

Whether it is a treehouse built on a tall plant, or a primitive farmland that has been reclaimed, it indicates that this is the place where the so-called Frostmoon Elves lived.

But even in such a place where there are obvious traces of life, not only do there not exist any remnants of the abyss, but even corpses and wreckage have not been found.

All the remnants of the shallow abyss, as if they had evaporated from the abyss, neither left the strange abyss nor inhabited the abyss.

The most crucial race that the Federation is trying to get in touch with is so thorough and so weird...... Disappeared directly into the interior of the abyss!