Based on the experience of the four six-winged Dark Spirit Demon Bats, these three tunnels should be the core of the Forbidden Land's formation.
They then thought of their fellow clansman who had once crazily broken the cave residence's restriction. For a moment, they hesitated whether to really break the restriction and enter to check the situation.
But this hesitation did not last long. Compared to the lives of their clansmen, they had no other choice.
Thus, they decided to have one six-winged Dark Spirit Demon Bat break it, so that if a problem arose, the entire army would not be annihilated.
And the six-winged Dark Spirit Demon Bat that broke the tunnel's restriction was Meng Zhiyuan's master, the strongest one here.
Finally, after eight months, he really did break the restriction of one of the tunnels, and nothing happened.
After entering smoothly, they finally discovered piles of supreme-grade spirit stones stacked like small mountains in the core of the formation.
Such a large number of supreme-grade spirit stones shocked the four six-winged Dark Spirit Demon Bats so much that for a long time, besides constantly drawing in cold breaths, they couldn't make any other sound.
The number of these supreme-grade spirit stones was something they had never seen in their entire lives. If their clan could possess these, they believed they could definitely produce a Spirit Transformation expert.
To their disappointment, most of these supreme-grade spirit stones were already dim and lackluster, as if covered by a layer of deathly qi.
Only about thirty percent of the supreme-grade spirit stones were still shining, but it was obvious that a good portion of their Spiritual Energy had been lost.
However, even though a lot of Spiritual Energy had disappeared from these thirty percent or so of supreme-grade spirit stones, for a cultivator, the rich Spiritual Energy still gave rise to endless greed.
Just this Spiritual Energy, if used for the cultivation of the four of them, might even allow them to break through.
At their level of cultivation, even in the outside world, it was as difficult as ascending to the heavens to advance even a single inch. But with the assistance of supreme-grade spirit stones, it was completely different.
In their impression, no matter how powerful a sect was, they had never been so extravagant as to use supreme-grade spirit stones for cultivation.
Fortunately, at the last moment, the four six-winged Dark Spirit Demon Bats maintained their last shred of rationality. They knew the importance of these supreme-grade spirit stones.
There were three tunnels at the core of the formation, continuously transporting pure Spiritual Energy in three directions, which was what maintained the normal operation of the Forbidden Land.
This was the key to their clan's immortality.
At this time, a problem arose. Although they had found the core of the formation and had immediately seen the reason for their clansmen's deaths, if they wanted to solve this problem, they had to take out a large number of supreme-grade spirit stones to restore the Forbidden Land.
But where would the supreme-grade spirit stones come from? First of all, the cave residences here were too hidden, and not many cultivators came here.
They couldn't go out to snatch spirit stones either, because they simply couldn't leave the fifty-li radius of this place.
Secondly, they didn't have many spirit stones left on them. Those were for extending their lives at critical moments.
They only had eight high-grade spirit stones, about thirty mid-grade spirit stones, and over a thousand low-grade spirit stones.
And most importantly, this formation used supreme-grade spirit stones.
Even if they could go out and snatch them, apart from the occasional few that Nascent Soul and above cultivators might carry, it was simply impossible to find so many supreme-grade spirit stones.
Thus, the four six-winged Dark Spirit Demon Bats began to think hard. They finally tried to see if they could slightly modify the core of the formation to enhance its power through other means.
The person who had set up this formation back then was many times more powerful than them. Even with four Nascent Soul level experts here, modifying it would be very difficult.
And they didn't dare to move it randomly. After thinking for a long time, they decided to keep the original structure of the formation here unchanged.
Instead, they added a small formation next to the core of the formation. This formation could assist the three tunnels with the power it acquired.
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In this way, the consumption rate of the remaining thirty percent of supreme-grade spirit stones could be greatly reduced, extending the operating time of the Forbidden Land's formation.
Although some clansmen would still die, it wouldn't be in large numbers.
With their efforts, this formation was finally completed after a total of seventy-three years.
The most difficult part here was not setting up the small formation, but how to completely merge the two powers without affecting the original operation of the grand formation.
Every step had to be repeatedly deduced countless times, because they only had one chance. One wrong step, and the entire Forbidden Land might be destroyed in an instant.
After the formation was completed, not only could ordinary spirit stones be used to assist in the output of Spiritual Energy, but the Essence Blood and Demonic Cores/Golden Cores of cultivators could also be used to convert into Spiritual Energy output.
However, the power converted from Demonic Cores and the Essence Blood of Demonic Beasts was too violent, so it could not provide a long and continuous output of power like ordinary spirit stones and cultivators' Golden Cores.
In this sea area, very few cultivators came, but many sea Demonic Beasts often appeared nearby. As long as they could capture these Demonic Beasts, they could solve their pressing problem.
Whether it was the Essence Blood, Demonic Cores, or Golden Cores of Demonic Beasts or cultivators, they were all the essence of a cultivator's life. This was also the best thing they could think of to replace spirit stones.
If they could kill a Nascent Soul cultivator, one Nascent Soul might be worth two or three supreme-grade spirit stones.
As a result, the various ranks of Demonic Beasts in the surrounding sea area faced a devastating disaster. At that time, there was even a fourth-rank sea Demonic Beast in this sea area.
Thus, the Dark Spirit Demon Bats began to constantly go out and deliberately reveal their presence. From the lowest-rank Demonic Beasts to the mid-rank sea Demonic Beasts, they were all lured into the Forbidden Land one by one.
With four six-winged Dark Spirit Demon Bats attacking at the same time, even that fourth-rank sea Demonic Beast, after being lured into the Forbidden Land, was eventually worn down and killed inside.
After that, although some clansmen of the Dark Spirit Demon Bats in the Forbidden Land continued to die one after another, the number was no longer increasing rapidly year by year.
Just like that, year after year, they hunted the Demonic Beasts in the surrounding sea area, and occasionally, cultivators passing by would also suffer the same fate.
The Dark Spirit Demon Bat clan waited bitterly for "Venerable Duanmu's" return.
The Demonic Beasts in the surrounding sea area also disappeared silently one by one, entire clans were wiped out, and their numbers plummeted.
This was certainly not good news for the Dark Spirit Demon Bat clan.
Without the assistance of power, the remaining supreme-grade spirit stones would be consumed even more quickly, which made the four six-winged Dark Spirit Demon Bats even more anxious.
And then one day, outside the deep-sea cave residence, a young man in white arrived. He stood on the mountain peak of the seabed, looking at the mountain peak that hid the Dark Spirit Demon Bat clan.
Afterwards, he flew to the mountain wall where the female cultivator surnamed Yang had broken the restriction.
The arrival of the young man in white made the four six-winged Dark Spirit Demon Bats particularly excited, because the aura fluctuations faintly emanating from this person were actually at the Nascent Soul stage.
They guessed that it was the aura deliberately and continuously released by the low-rank Dark Spirit Demon Bat beasts sent to the periphery that had attracted his attention, which was why he had come.
After all, at this time, this deep-sea area was almost devoid of even first-rank Demonic Beasts, except for ordinary sea creatures.
The Forbidden Land's formation was operating every day. Since there were no mid to high-rank Demonic Beasts, the low-rank ones had to make up for it with numbers.
Even if ten low-rank Demonic Beasts condensed a very small drop of Essence Blood, that was still good.
As a result, if a cultivator occasionally entered this deep sea, in a situation where everything was empty, and suddenly sensed the aura of some Dark Spirit Demon Bats, it would immediately stand out like a bright lamp in the dark night.
Thus, the four six-winged Dark Spirit Demon Bats, led by Meng Zhiyuan's master, immediately surrounded him from the shadows.
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However, just as they approached a little, the young man in white immediately let out a cold snort.
"You things that don't know life from death!"
The four of Meng Zhiyuan's master knew that they had been detected, so they no longer hesitated and immediately pounced with sinister smiles.
As for how they were discovered by the other party, when cultivators reached their level, the sense between life and death was already inexplicable. It was related to the cultivation methods one practiced and the battles one had experienced.
What's more, it was not a rare thing for a Nascent Soul stage cultivator to have a super-strong warning magical treasure.
Especially since among the four of Meng Zhiyuan's master, two were already at the peak of the fourth rank, which meant they were great cultivators at the late-stage Nascent Soul.
This was also a major reason why they had dared to besiege that fourth-rank sea Demonic Beast back then.
In addition, the Dark Spirit Demon Bat clan had been imprisoned here all along. Even if their cultivation was deep, their state of mind could no longer remain calm. Instead, they were entangled with ruthlessness and brutality.
So, in this situation, even if the other party had a heaven-defying magical treasure, they would charge up without hesitation, capture his Nascent Soul, and refine his Essence Blood.
However, the ferocity on the faces of the four six-winged Dark Spirit Demon Bats had just appeared when it froze in the next moment.
Because they found that their bodies could no longer move an inch in just an instant.
"What rank are you exactly!!!"
Following a mournful cry from the few six-winged Dark Spirit Demon Bats, four powerful existences that were enough to shake the heavens and roam the world, exploded into clouds of blood mist in an instant. Not a single Nascent Soul escaped.
By the time Meng Zhiyuan's master and the other three realized something was wrong, it was already too late.
The reason they shouted that sentence was because even if the other party was a late-stage Spirit Transformation expert, it was impossible to restrain them so easily.
You must know that among them were great cultivators at the late-stage Nascent Soul. At this point, they already had some control over the laws of heaven and earth.
That was a power beyond this realm. In a life-and-death situation, it was possible for them to resist for half a breath to a full breath.
But after this young man in white discovered them, his body didn't even move. He just gave them a cold glance.
With just this one glance, the power in their bodies vanished in an instant, and they couldn't even muster the slightest thought of resistance.
In a flash of lightning, they had already judged that this person was even more terrifying than "Venerable Duanmu" back then, much more powerful, and by an unknown number of times.
It was obvious that the other party had hidden his cultivation before, but before they could beg for mercy, an irresistible force instantly destroyed everything they were.
The young man in white let out a soft, cold snort. He waved his hand and grabbed the few clouds of blood mist that had exploded, all in one go.
Then, as if he were kneading a solid object, he kneaded these clouds of blood mist into a dark-colored light ball, which he casually threw into his storage space.
"Mere ants, yet you still want to ambush me. Death is not to be regretted!"
Afterwards, the young man in white actually ignored the restriction here and took a step forward. The next moment, he appeared in front of the three inner sub-cave residences.
Looking at the three sub-cave residences, the man in white glanced at them for a few moments, then immediately walked towards the one that the Dark Spirit Demon Bats regarded as the most mysterious.
Afterwards, his figure, like a drop of water, quietly merged into the gate of that cave residence.
All of this was witnessed by the terrified Dark Spirit Demon Bats in the shadows. This person was too powerful.
Let alone the fact that their four top-tier experts couldn't last a single breath against him, even the cave residence they regarded as incomparably mysterious, the other party seemed to step into it as if it were his own home.
Just as they were letting their imaginations run wild, not knowing what to do next, after only one and a half breaths, the figure of the young man in white abruptly appeared again in the plaza outside the sub-cave residence.
(End of Chapter)