The autumn breeze is blowing, and the leaves are colorful.

It's autumn.

Chu Nan, under the leadership of Elder Wang, left the Nanxiao Sect all the way.

For this mysterious Nanxiao sect master......

Chu Nan has always been very curious, and at the same time, he has secretly investigated with his demon sense very early, and in the Nanxiao Sect, there has been no discovery, since then, Chu Nan has realized that this mysterious sect master is not in the sect.

Now, after leaving the sect, they came to a stone forest.

This stone forest is very weird, and before you step in, you can feel the gloom in advance, and a strong sense of crisis rises from the stone forest.

Chu Nan's heart sank.

I have a strong premonition that if I step into it, I will have a chance to come out alive...... Minimal!

"This stone forest is a powerful formation that has existed for a long time, you must follow me, if you take a wrong step here, you and I will have a life and death crisis. ”

Elder Wang's expression was extremely serious.

Chu Nan nodded.

Under the leadership of Elder Wang, he began to walk into the stone forest.

The stone forest is pitch black, and the gloomy aura is even stronger, such a formation is extremely strong, far from being comparable to those formations that Chu Nan has been in contact with in the past.

After Elder Wang stepped into the stone forest, his whole person's expression also became solemn, even with his cultivation, once there was a mistake in the process of traveling, there would be a life and death crisis.

The road in the stone forest is very changeable, whether it is straight, or tortuous, or narrow, or open.

And walking in the stone forest is not to keep moving forward, sometimes you need to choose to retreat at the right time in order to open up a new and correct path.

Walking and stopping, constantly moving forward and backward, Chu Nan saw that Elder Wang's mouth kept moving, whispering some kind of term that Chu Nan didn't understand.

This stone forest is very special, one person comes in, and two people come in together, there will be differences in the way of walking, although Elder Wang is more familiar with this stone forest, the number of times he can bring people to come is obviously not much, and the speed of walking is not very fast, and it needs to be calculated constantly in the process of traveling.

At the same time, although there was no mistake in his calculation method, in terms of calculation speed, sometimes he couldn't keep up, causing Chu Nan to feel a terrifying force several times, like a volcano about to erupt, but fortunately, before each time it was about to erupt, Elder Wang was able to calculate the next move in time, so as to resolve it.

Chu Nan was also terrified, and he had a deep understanding of the horror of this powerful formation.

This stone forest didn't seem to be big, but Chu Nan and Elder Wang traveled for a whole day before they finally came to the deepest part of this stone forest.

There is a huge stone pillar that towers up to the sky, and at a glance, you can barely see the top!

The whole body is pitch black, and there are incomparably terrifying aura fluctuations on it, even people who don't understand the formation, when they come here, they all understand that this pitch-black stone pillar is obviously the eye of the formation of this stone forest!

In the middle of this stone pillar, there is a cave, which is inconspicuous when viewed from a distance, but when you get closer, you can immediately feel it...... From this cave, there is a chill that makes people's scalps tingle, as if in this cave, there is an incomparably strong cold beast!

Elder Wang took Chu Nan to the cave, then stopped, his expression respectful, and bowed deeply to the dark cave.

"Meet...... Sect Master!"

Chu Nan's eyes flashed, although he didn't use his magic sense to investigate, but he also knew that the mysterious sect master was inside this cave!

As early as when he entered this stone forest, Chu Nan had already tried to use his magic sense to investigate, but within this stone forest, there was an invisible barrier, so that Chu Nan's magic sense was blocked, and he could not investigate the stone forest, unless it was him...... Forcible investigation.

If it was just forcibly investigated, Chu Nan was worried that it would stimulate this stone forest formation and cause accidents, so he did not use his magic sense to forcibly investigate.

At present, Chu Nan also followed the example of Elder Wang, and looked towards the cave in front of him, respectfully bowing to him.

There was no sound coming from the cavern, as if no one existed in it, until a little later a low, hoarse voice sounded from inside the cavern.

"You're here...... Let Fu Shuang come in......"

Elder Wang immediately replied with a respectful expression.

"Yes, Sect Master. ”

Then he motioned to Chu Nan to go to the cave with his eyes.

The sect master obviously wanted to summon Chu Nan alone, and Elder Wang would not follow.

Chu Nan's heart remained calm, and he walked towards the cave step by step, and the closer he got to the cave, the more he could feel the cold emanating from the cave.

It didn't take long for him to walk to the cave and glance back at Elder Wang.

Elder Wang smiled and nodded at him.

Call!

Only then did Chu Nan take a step and step into the cave.

......

When Chu Nan stood outside the cave, it was completely dark from the outside and he couldn't see anything, but after stepping into the cave, he found that the cave was bright, and there was even a warmth emanating from it, and there was no longer a trace of cold earlier.

At the same time, in front of Chu Nan, there was a winding path that stretched to the deepest part of the cave.

Chu Nan continued to walk along this path, and the line of sight in front of him also became wider, and more intense aura continued to radiate as he went deeper.

When Chu Nan came to the deepest part of the cave, he found that this place was far more open than he imagined, it was in the center of the stone pillar, and the entire stone pillar was hollow, because the stone pillar was too high, the light above could not shine down, but there was a lot of aura here, and it was these aura that lit this up.

After Chu Nan came here, he saw a figure in front of him at a glance, it was a black-robed man, he was facing Chu Nan with his back, sitting cross-legged in front of a stone wall, on which a huge and incomparably complex formation was depicted.

"Yudan Realm...... Great Perfection!"

Chu Nan's heart shook.

This was the first time he had seen a powerhouse of the Great Perfection of the Jie Dan Realm!

However, what made him feel strange was that the oppression brought to him by the other party was far smaller than he imagined, and it was not even as oppressive as Elder Wang brought when he was in the first place.

Chu Nan felt that maybe it was the other party's state that there was a problem.

"Disciple Fu Shuang, meet the sect master!"

Chu Nan took a step forward and bowed respectfully to the black-robed man who was sitting cross-legged.

The black-robed man didn't look back, as if he hadn't heard, he was still looking at the formation on the stone wall in front of him, he had been looking at it for a long, long time......

Although the black-robed man in front of him did not respond, Chu Nan still bent over, lowered his head, and his eyes shone with essence.

Through the oppression emanating from his body, Chu Nan thought of something, and some speculations appeared in his heart......

Half an hour later.

Only then did the black-robed man hear a low and hoarse voice.

"Your Dan, I've tried it, and the effect is good, but it's a pity...... It didn't work for me. ”

Chu Nan was not surprised by this, he had already guessed it.

If his Spirit Transformation Pill had worked for him, he would have summoned him a long time ago, and he wouldn't have waited until now.

"Except for this Dan, you ...... Will you refine other pills?"

The black-robed man asked.

Chu Nan couldn't help but hesitate in his heart.

He was considering whether to take out the Golden Spirit Transformation Pill.

Now although he has been summoned by the other party, he can't be valued by the other party in a short period of time, after all, the ordinary Spirit Transformation Pill he has refined is not effective against him, and if he sacrifices the Golden Spirit Transformation Pill at this time, he will undoubtedly be able to change this situation in an instant.

However, after thinking about it for a while, Chu Nan still didn't take out the Golden Spirit Transformation Pill.

"Sect Master, the disciple is lucky, he has just mastered the method of the spirit pill, except for the spirit transfer pill recorded in the sect's alchemy method, the other pills, the disciples have not yet come into contact with them, and they will only refine the spirit turn pill at present. ”

The black-robed man fell silent again, as if thinking, but this time he wasn't silent for long.

"I have an alchemy jade slip here, which records the two elixir pills and the refining method, I will send this slip to you now, you ...... Right here, alchemy for me!"

Call!

The black-robed man's voice fell.

A black jade slip flew straight out of him and flew in front of Chu Nan.

Chu Nan's eyes flashed slightly, and he secretly rejoiced in his heart.

He chose the right one!

If he had taken out the Golden Spirit Transformation Pill just now, then he would probably not have been able to get this Alchemy Jade Slip now.

Although he was happy in his heart, Chu Nan's face showed a difficult color.

"Sect Master, the disciple has just started alchemy, I'm just afraid of ...... I'm afraid that I may not be able to successfully refine these two elixirs. ”

"You just have to refine these two spirit pills, these two spirit pills are originally left by the predecessors of this sect, but the conditions for refining these two spirit pills are harsh, and you need to have the qualifications of an alchemist to have the possibility of successful refining. ”

"Over the years, there has only been one alchemy apprentice in our Nanxiao Sect, let alone an alchemist, so I didn't keep these two elixirs in the sect, but carried them with me. ”

"Now that you can refine the Perfect Pill without guidance, with your qualifications in alchemy, these two elixirs will not be difficult for you. ”

The black-robed man's voice was low, as if there were no emotional fluctuations, not in his words, but there was an implied oppression, as if he was putting pressure on Chu Nan, and the meaning under the words was obvious, it was inevitable that Chu Nan would refine these two kinds of Dan.

Chu Nan immediately cooperated and made a very stressed look, gritted his teeth, and held the jade jian.

Airplanes!

When the aura in Chu Nan's body was condensed into the jade slip, in Chu Nan's mind, the refining pills and refining methods of these two spirit pills appeared.

These two elixirs......

They are all elixirs that can only be used in the Dan realm!

Even if Chu Nan refines it now, it is only effective for existences above the Yu Dan Realm.

Cultivators below the realm of the Jie Dan are not able to take this kind of elixir.

At the same time, both the materials required to refine the spirit pill and the difficulty of refining it far exceeded the spirit turning pill by too much.

The Spirit Transformation Pill is only the most basic entry spirit pill, and now the spirit pill that the black-robed man wants Chu Nan to refine is directly a very difficult spirit pill.

It seems that I jumped directly from the entry level to the hell level all at once!

There's nothing over-the-top in between......

This is an impossible task for any alchemist!

Even after Chu Nan saw it, he frowned, feeling the difficulty, and his face turned pale in an instant, making a desperate expression.

"I have prepared the materials for refining the elixir and the Dan furnace for you, and you will leave when you refine it. ”

The black-robed man said indifferently.

Not far away, a lot of alchemy materials have been piled up, and at the same time, the Dan furnace has also prepared three tripods.

Only then did Chu Nan realize ......

The black-robed man already had such a plan after taking his own Spirit Transformation Pill, and the reason why he didn't summon himself during this time was that he was preparing the materials for refining these two spirit pills for himself, and only when everything was ready did he summon himself and let himself come here to refine the pill for him.

But......

This is also in the hands of Chu Nan!

Chu Nan had wanted to find an opportunity to get close to him, but now that he was refining pills for him here, he could just stay by his side and wait for the rebellion to appear!

According to Chu Nan and Dong Yuchen's plan, they will find opportunities to get close to the sect masters of the Nanhong Sect and the Nanxiao Sect respectively, and then do something to them.

Although with the cultivation of Dong Yuchen and Chu Nan, even if they successfully moved on the strong people of the Great Perfection of the Jie Dan Realm, it would be difficult to cause too much damage to the strong people of the Great Perfection of the Yu Dan Realm, and if the other party was prepared, it would not even play any role.

However, when the rebellion occurs, the two of them will be in the Great Perfection of the Dan Realm, and there will inevitably be a bloody battle, and when the two of them are attrition in the fight, Chu Nan and Dong Yuchen will have the opportunity to inflict heavy damage on the two!

Even if it is a strong person in the Great Perfection of the Soul Fusion Realm, in the case of great loss, there is a possibility that they will be severely injured or even killed by the Spirit Fusion Realm cultivator.

What's more, Chu Nan and Dong Yuchen are not ordinary Spirit Fusion Realm cultivators.

Chu Nan knew that most of Dong Yuchen would still do something to the sect master of the Nanhong Sect in the same way, and Dong Yuchen had many means to be underestimated.

And Chu Nan here plans to use the elixir to move some hands and feet on the elixir, and when the other party takes the elixir, Chu Nan's poison can quietly sneak into the other party's body.

It's just that now in the case that the Spirit Transformation Pill is ineffective against him, except for the two pills that the black-robed man designated Chu Nan to refine, Chu Nan has no chance to let the other party take other pills, unless he takes out the Golden Spirit Transformation Pill himself.

"In other words, I have to refine these two pills before the rebellion starts, otherwise I can only take the Golden Spirit Transformation Pill and let him swallow it. ”

Chu Nan felt the pressure.

If it wasn't a last resort, he didn't want to expose the Golden Spirit Transformation Pill.

But in less than a month, to refine these two extremely difficult elixirs, Chu Nan was not too sure.

"I can only try my best!"

Chu Nan devoted his entire body and mind to alchemy, and the difficulty of refining these two spirit pills was extremely huge for Chu Nan at this stage, and he couldn't be distracted at all.

Chu Nan could only hope that the rebellion would not break out in advance, otherwise it would be difficult for his side to do anything to the sect master of the Nanxiao Sect, and it would be difficult for the plan to succeed if he relied on Dong Yuchen alone.

Chu Nan has a good talent in alchemy, and he feels that there is still a little hope......

Time passes.

Two weeks have passed in a flash.

Chu Nan didn't know anything about the situation outside, and he didn't even pay attention to whether the sect master of the Nanxiao Sect who was not far away had looked back at him during this time.

During these two weeks, his entire mind was immersed in the process of alchemy, his eyes were red, and after countless attempts, they all ended in failure.

"This kind of Dan ...... It's not at all something that an alchemist of my level can refine!"

Chu Nan had despair in his heart.

He knew that there was also a hierarchy of alchemists.

Strictly speaking, the alchemy method that he has mastered and comprehended now is not even a first-grade alchemist, and the current Dan that the Nanxiao Sect Master asked him to refine requires at least a third-grade alchemist, or even a higher-level alchemist, to be able to refine it.

These two types of Dan ......

It's really too much beyond Chu Nan's current alchemy attainments!

The second is the material.

Generally, the better the alchemy herbs, not only the effect of the refined pill will increase, but also the success rate of refining will also be greatly improved.

Although the sect master of the Nanxiao Sect provided Chu Nan with enough medicinal materials, these medicinal materials themselves were the most common type of medicinal materials, and even some medicinal materials were replaced by other medicinal materials with similar effects, which made Chu Nan's alchemy even more difficult.

Until now......

Chu Nan was almost certain that these two kinds of Dan, with the current conditions, could not be refined at all.

This couldn't help but put him in a predicament.

While pondering, Chu Nan quietly released his magic sense, wanting to start from other aspects.

Airplanes!

With the release of his magic sense, he was surprised to find that his magic sense was no longer hindered by the stone forest earlier, and it instantly spread throughout the cave.

"Could it be because of this place?"

Chu Nan's heart was enlightened.

This place is located in the stone pillar of the eye of the formation, and the location is special, so it can be said that it is not shrouded in the formation.

This could be felt from the time Chu Nan entered the cave.

And now, without the obstacle of the formation, Chu Nan's demon sense easily covered the entire cave, and focused on the sect master of the Nanxiao faction.

Under Chu Nan's demonic sense.

The other party's face clearly appeared in his mind.

The Nanxiao Sect Sect Master's face was grim, with some scars on his face, and his eyes were firmly fixed on the formation pattern on the stone wall in front of him, motionless, as if he had been studying this profound and complex formation pattern all along.

When Chu Nan's demon sense tried to find it on his body, he felt that his body was shrouded in a cloud of mist, blocking his demon sense, and it was difficult to penetrate into the mist.

It's obvious...... There are treasures on his body that can block the detection of the demonic sense.

This couldn't help but make Chu Nan frown.

Don't dare to forcibly investigate.

Right now, with Chu Nan's magic sense covering the entire cave, everything in the cave clearly appeared in Chu Nan's mind.

Suddenly......

Chu Nan found that there was an object placed beside the sect master of the Nanxiao faction, and when he looked closely, it turned out to be a box that he was familiar with! These three boxes were all put together, and they were placed next to the sect master of the Nanxiao sect at random.

"These three boxes, sure enough, are here with him!"

Chu Nan's heart was suddenly moved.

He'd been looking for the three boxes, and they were not far away.

The sect master of the Nanxiao Sect didn't seem to care about it, and only the formation pattern on the stone wall was in his eyes.

Chu Nan's heart couldn't help but pound.

I didn't expect the sect master of the Nanxiao Sect to put the box aside so casually.

His mind raced as he thought of a way to get the box.

He was well aware......

Even if the sect master of the Nanxiao Sect didn't care about this box, he didn't have the opportunity and method to get close to the other party now.

Chu Nan's mind was spinning rapidly, and one thought after another was constantly constructed from his mind, and he quickly eliminated it.

In the end, under his hard thinking, he finally came up with a reluctant way, although he could not guarantee that he would succeed, but he could try, and even if he failed, it would not arouse the suspicion of the other party.

After Chu Nan made a decision in his heart, he was about to take action, but the eyes of the sect leader of the Nanxiao Sect, who had always stared at the formation pattern on the stone tablet, had not shown any fluctuations, but at this moment, he jumped a little.

This suddenly made Chu Nan pause when he was about to move forward, carefully paying attention to the expression of the sect leader of the Nanxiao Sect.

Chu Nan discovers ......

Not only did the Nanxiao Sect Master's eyes fluctuate, but his eyebrows were tightly wrinkled at this moment, and there seemed to be a cold glint shining in his eyes.

Call!

Immediately after, his body, which had been sitting cross-legged, ...... from the ground Stand up!

This made Chu Nan's heart feel a pang, and a bad premonition rose.

"Could it be...... The rebellion is ahead of schedule!"

After the sect master of the Nanxiao Sect stood up, he didn't even look at Chu Nan, and as soon as his figure moved, it turned into a streamer of light, and disappeared into the cave in an instant.

Chu Nan's expression was extremely solemn.

Nine times out of ten, the sudden departure of the sect master of the Nanxiao faction was due to rebellion, which made Chu Nan's heart even more urgent.

"There's no time!"

Chu Nan looked at the box not far away, his body moved, and he quickly approached.

While he was acting, his magic sense still permeated the entire cave to prevent the Nanxiao Sect Sect Master from suddenly returning.

Now that time is pressing, Chu Nan approached the box in front of him as fast as he could, stretched out his hand, and grabbed it as fast as lightning.

However, at the moment when Chu Nan's finger was about to touch the box, his pupils suddenly contracted, and he forcibly dropped his hand......

Stop!

"Sure enough...... It's not that simple!"

Chu Nan's eyes narrowed slightly.

This box didn't seem to be important to the sect master of the Nanxiao Sect, but under the box, there was a small formation that was imperceptible to the naked eye.

This formation just shrouded the box, if Chu Nan touched the box unexpectedly, it would trigger this formation and make it explode!

This formation seems to have a small scope, but it contains a terrifying power that moves Chu Nan, if it is detonated without defense, even Chu Nan will have a life and death crisis.

Fortunately, at the right moment, Chu Nan noticed the abnormality, felt the crisis, and forcibly stopped the falling right hand.

"You have to think of a way!"

Chu Nan frowned.

I didn't expect the other party to arrange the formation under the box.

With his current cultivation, he can't crack it from the formation level, and there is no other way than to crack it strongly.

If you choose to crack it strongly, regardless of the power of the formation, this move alone will expose Chu Nan!

If the sect leader of the Nanxiao Sect did not leave because of a rebellion, but had something else to do to temporarily walk away, or a temptation to Chu Nan, then everything Chu Nan had planned before would be wasted because of this move.

But if the sect master of the Nanxiao faction really fled because of the rebellion, then Chu Nan had to get this box as quickly as possible, and the longer the delay, the more difficult it would be for the plan to succeed.

This moment is undoubtedly a test of Chu Nan's mind and determination!

"Although there is still some time before the time of the rebellion, Dong Yuchen said that the rebellion may advance at any time. ”

"And judging from his expression just now, there is no possibility of tempting me, because he doesn't know that I have demonic sense, let alone that I can see his expression, he has his back to me, if he wants to test me, he won't deliberately have that kind of expression, and now except for the outbreak of the rebellion, I can't think of anything else that can make the sect master of the Nanxiao Sect, who has stayed here for ten years and doesn't care about the world, have to leave here!"

A thought flashed in Chu Nan's mind, and in the next second, he made a decisive choice.