Even He Changzai, who was standing by, was filled with disbelief when he saw Shen Yuan casually taking out the ancient black ice.

Although the essence of the Eternal Mysterious Ice is just the middle-level Qi of Heaven and Earth and the cold weather at the end of the year, its own value far exceeds the ordinary Qi of Heaven and Earth.

The four words "freeze lifespan and prolong vitality" are enough to make even Master Lianxu excited.

In this prosperous era of cultivation, any treasure related to longevity is the most precious thing. Even a longevity pill that can extend one's life by three years is worth far more than a spiritual treasure.

Although the Eternal Mysterious Ice cannot directly extend one's lifespan, its icy power to freeze time is, in many cases, even more valuable than elixirs that can extend one's lifespan.

For example, if a cultivator is seriously injured, freezing him with the ancient mysterious ice can buy time for treatment.

Or perhaps a veteran master of a sect is nearing the end of his life, and he could be frozen in the ancient mysterious ice, which could be used to continue the sect's heritage in this special form until the next master of the spirit appears.

The only pity is that the Eternal Mysterious Ice is only a middle-level Qi of Heaven and Earth after all, and its ability to freeze life span can only work at the level of Spirit Refining or below.

Faced with the Great Immortal Huanxu who has entered the Huanxu realm and mastered the power of heaven and earth, the Eternal Mysterious Ice can hardly play its due value.

But even so, it still cannot conceal the preciousness of the ancient black ice.

The Eternal Mysterious Ice cannot be compared with the Earthly Demonic Power, but it is definitely more than enough to exchange for four volumes of the Earthly Demonic Power cultivation method that already has an owner.

All of a sudden, many people on the third floor of the Wanwu Chamber of Commerce moved towards this place, and even two old-looking soul-refining masters showed their intention to make a deal with Shen Yuan.

At this time, Deacon Wan finally recovered from his shock, looked at the high-level practitioners and said urgently:

"The distinguished guest has decided to trade this treasure with our Wanwu Chamber of Commerce. Please do not interfere with the normal transaction."

After Deacon Wan said this, many cultivators stopped in their tracks. Even the two Soul Refining Masters shook their heads after a moment of hesitation and gave up the idea.

As true spirit cultivators, they naturally do not need to care about Deacon Wan, a mere great cultivator at the Spirit Transformation Realm. However, Deacon Wan represents the entire Chamber of Commerce of All Things.

Being in the Chamber of All Things, they should abide by the chamber's trading rules. A piece of ancient mysterious ice is not worth the risk of breaking the rules.

Seeing this, Deacon Wan breathed a sigh of relief. With a slightly trembling gaze, he looked at the Eternal Mysterious Ice in Shen Yuan's hand and whispered:

"Would you mind letting me check it out?"

Shen Yuan casually handed the ancient mystical ice in his hand to Deacon Wan, not caring at all about this precious thing that could prolong life in the eyes of outsiders.

Deacon Wan tried to take the Eternal Mysterious Ice, but the moment he touched it, a little bit of frost began to spread from his palm toward his arm.

Deacon Wan was shocked and quickly mobilized the magic power in his body to suppress the frost, and only then was he able to reluctantly take over this precious ancient black ice.

This is just the normal state of the ancient black ice, and it has not yet triggered the impact of the cold weather at the end of the year.

Once in the activated state, the chill of freezing time can easily devour all life. Even if Deacon Wan has reached the realm of incarnation, he is simply unable to resist the icy power of Xuanbing.

It was so difficult for Deacon Wan to hold the Eternal Mysterious Ice, which formed a sharp contrast with Shen Yuan's nonchalant movements. This made Deacon Wan secretly marvel at the extraordinary means of Shen Yuan.

Suppressing the throbbing in his heart, Deacon Wan used the treasure identification technique and began to identify the treasure in front of him.

When the spiritual light in his spiritual eyes glimpsed the cold energy of the year within the eternal black ice, Deacon Wan finally confirmed that the ice crystal in front of him was the legendary eternal black ice.

Wiping away the beads of sweat on his forehead, Deacon Wan looked at Shen Yuan and smiled:

"This kind of rare treasure is hard to find. This is also the first time I have appraised such a treasure. I am sorry to have kept you waiting for so long."

Shen Yuan didn't care about the waiting time.

Compared to this, he was quite curious about the treasure appraisal technique performed by Deacon Wan.

However, this method of treasure appraisal must be the fundamental inheritance of the Chamber of Commerce of All Things. Speaking up rashly might cause dissatisfaction on the other party, so it is better not to mention it directly.

Shen Yuan tapped the counter lightly with his index finger and said casually, "Now that the appraisal result is out, Deacon Wan, please make the offer."

Deacon Wan held the ancient mysterious ice in his hand and said seriously:

“This ice crystal is indeed the legendary ancient black ice. It is said that such a treasure can only be found in Taiyin Guanghan Palace. It can freeze cultivators below the level of True Spirit Refiner and slow down the consumption of their lifespan. Its value far exceeds that of other mid-level Heaven and Earth Qi.

A piece of ancient black ice can be used for a very long time. If it is assisted by other high-level ice spiritual objects, it is not impossible to extend it for ten thousand years."

After a slight pause, Deacon Wan changed the subject and said:

“However, the Eternal Mysterious Ice cannot directly increase one’s lifespan, and one’s consciousness becomes stagnant when frozen in the Eternal Mysterious Ice. One needs someone from the outside world to take the initiative to thaw the ice before one can be born.

Moreover, most people do not need the Eternal Mysterious Ice to last for too long. Only in some special occasions can the effectiveness of the Eternal Mysterious Ice be fully exerted.

Therefore, the value of the Eternal Mysterious Ice may be reduced to a certain extent."

Shen Yuan knew clearly in his heart that what Deacon Wan said was not entirely to lower the price, but was a question of the real existence of the Eternal Mysterious Ice.

However, with the advent of the connection between heaven and earth in a few decades, after the immortals and gods have demarcated the heaven and earth and opened the tide of spiritual energy, the value of the ancient mysterious ice will undergo earth-shaking changes.

At that time, the ancient mysterious ice that can freeze a real person of spirit refining and slow down the consumption of his lifespan can perfectly ensure that a real person of spirit refining can survive the three thousand years of spiritual energy depletion period. Its value is immeasurable.

Of course, these are things that will happen decades or even hundreds of years later and have nothing to do with Shen Yuan today.

His current goal is only to exchange the Eternal Mysterious Ice for the four volumes of methods for practicing the Earthly Demonic Powers.

To him, the Eternal Mysterious Ice was just something that could be created at will by spending a certain amount of time and Yuan Qi. On the contrary, if he brought back the four volumes of methods for practicing the Earthly Demonic Powers to future generations, as long as one of the Earthly Demonic Powers was unowned, it would be a huge profit for Shen Yuan.

Deacon Wan was naturally unaware of Shen Yuan's thoughts.

But after seeing Shen Yuan nod his head, which was considered as his approval of his statement, Deacon Wan finally let go of his worries and said to Shen Yuan:

“This piece of ancient mysterious ice is of extraordinary value. My Wanwu Chamber of Commerce is willing to purchase it at the price of five low-grade spiritual treasures.

The price of these four volumes of the method of cultivating the Earthly Demonic Power is four low-grade spiritual treasures. If the customer agrees to the transaction, I will allow the distinguished guest to choose any low-grade spiritual treasure displayed in the Chamber of Commerce of All Things, or a spiritual object of equal value."

As he spoke, Deacon Wan added:

“Of course, if you want spirit stones, our Wanwu Chamber of Commerce can also compensate you with 200,000 spirit stones.

However, many of the precious spiritual objects in the Chamber of Commerce are consigned by other monks, and we do not support the purchase of spiritual objects. I suggest that you choose the treasures directly."

Deacon Wan's words seemed like a normal transaction, but anyone with a discerning eye could see that it was a gesture of goodwill.

The normal price of a low-grade spiritual treasure is about 200,000 spiritual stones, but there are also differences between low-grade spiritual treasures. Among them, the precious low-grade spiritual treasures can even be sold at a high price of more than 300,000 spiritual stones.

Allowing Shen Yuan to freely choose low-grade spiritual treasures is equivalent to giving Shen Yuan more than 100,000 spiritual stones, which is a huge amount of money.

Shen Yuan naturally understood Deacon Wan's gesture of good will, and nodded and smiled in response:

“In that case, let’s do the deal as Deacon Wan said.

However, I don't need to make up for the difference in price with spiritual treasures. I would also like to ask Deacon Wan to help me select some magical spells on deduction and breath control, or popular high-level spells, travel notes and classics such as world news."

Shen Yuan's words made Deacon Wan stunned, but since Shen Yuan took the initiative to ask, he would not refuse, and quickly said:

"The number of books required by the distinguished guest is quite large. I will immediately arrange for someone to go and look for them."

After saying this, Deacon Wan turned and walked towards the second floor.

For Shen Yuan, who already possesses the Huiming Immortal Sword, a mere low-grade spiritual treasure is of no use to him.

On the contrary, the knowledge that has not been cut off in this prosperous era of cultivation is more valuable to Shen Yuan.

Whether it is the method of deduction and breath concealment that Shen Yuan wanted to find from the beginning, or the high-level spells that are popular in this era, they are all precious knowledge that is hard to find in later generations.

Even on the Dao forum, there are only a few words of record. The real core inheritance is kept within the sect, waiting for the genius to join the sect and then be passed on.

As for travel books such as "What's Happening in the World", they were completely Shen Yuan's sudden idea.

Shen Yuan has gained a lot of advantages by relying on the convenience of completing hidden tasks in the future.

The tasks of enthroning the Dragon King of Jidu, intimidating the Yunmeng Dragon Palace, defeating the holder of the Zhulong Immortal Sword, and killing Kuang Tianjie, the master of the Xuehe Yuantu Dao, were absolutely fatal tasks ten thousand years ago.

In later generations, Shen Yuan successfully completed these tasks by using tricks. After coming across many hidden tasks, Shen Yuan also discovered a characteristic of hidden tasks, which is to cause trouble and make big things happen!

The bigger the things you do, the easier it will be to become famous throughout the world before the passage of time, and the better the rewards for hidden tasks will be.

Shen Yuan purchased classics such as What the World Has Seen, intending to use them to learn how to do big things to trigger hidden tasks.

While Shen Yuan was thinking, Deacon Wan, who hurried downstairs, had a storage bag in his hand. He walked to the counter and took out the things in the bag one by one.

The jade slips were neatly stacked on the counter. At a glance, there were at least seven of them, with magical lights flashing on them continuously.

Deacon Wan extended his hand and took the initiative to introduce Shen Yuan:

“The value of these books requested by the distinguished guest is not very high.

Among these spells, there are three high-level spells of breath-concealing spells, and a mysterious magical power of freedom and impermanence. If one practices it to a profound level, even if one is two major realms higher, no one can glimpse the true level of cultivation. The only flaw is that one will appear to be a mortal in the eyes of anyone.

There are two high-level deduction methods, and one extraordinary deduction method evolved from the "Six Yao Mathematical Classic" of the Six Yao Divination. "

Shen Yuan raised his eyebrows slightly. The five high-level spells, one mysterious and one extraordinary magical power that Deacon Wan brought out alone were worth more than a low-grade spiritual treasure.

Deacon Wan then took out several other jade slips, as well as some scrolls, books and other miscellaneous items from his storage bag.

"The high-level spell books are all about the popular practice spells. The secret methods of various schools have never been recorded in them. I believe you should know the key to this.

As for these books about the world's knowledge, they were not written by Dao Wen, but some miscellaneous books, as well as some lists of the top ten peerless masters, top ten beauties, seven forbidden places, etc. selected by the Tianji Pavilion.

These things are not very valuable, so they are given to the distinguished guests as gifts.”

Shen Yuan's eyes lit up slightly, and he bowed to Deacon Wan and said:

"Thank you, Deacon Wan."

As he spoke, Shen Yuan waved his sleeves and put all the things into the storage ring, leaving only the ancient mysterious ice.

After completing the transaction, Shen Yuan did not continue to stay in the Wanwu Chamber of Commerce, but chose to turn around and go downstairs.

After Shen Yuan left, Deacon Wan carefully placed the Eternal Mysterious Ice into a special jade box and pasted several precious talismans on it.

Deacon Wan walked into a secret room on the third floor with the jade box in his hand, and said to a great monk in the secret room:

“I heard that Rongcheng Dayutian is collecting things that can prolong life, so you can send this piece of ancient black ice to show your goodwill to Rongcheng Daojun of Rongcheng Dayutian.

I am afraid that the next big auction of our Wanwu Chamber of Commerce will require a True Lord from Rongcheng Dayutian to take charge."

After leaving the Wanwu Chamber of Commerce, Shen Yuan did not choose to find a place to stay. Instead, he looked at He Changzai from the Tianyun Sect who came out with him, and said directly:

"Fellow Daoist He has been following us all the way. Is there something wrong?"

He Changzai stroked his beard and smiled, "I saw Fellow Daoist Shen on the third floor and he seemed to be interested in the method of practicing the Disha magic and the method of deduction.

I happen to have a book on the cultivation of the Disha Magical Power, I wonder if Fellow Daoist Shen is interested?"

Shen Yuan's eyes suddenly lit up when he heard this.

Among the various spells he needed, the method of concealing his breath was actually only second, and what he really valued most was the method of deduction.

Unfortunately, the methods of deduction are all secrets that are not passed on by major sects. Even the Chamber of Commerce of All Things can only use extraordinary-grade deductive powers, which may not be enough for Shen Yuan.

If he could obtain the method to deduce the Earthly Demonic Power, it would definitely be a good thing for Shen Yuan.

Shen Yuan quickly asked:

"May I ask what method of cultivating the Earthly Demonic Power that Daoist Fellow He mentioned?"

He Chang looked around, set up a barrier casually, and then took out a yellowed book from his storage ring.

There are four big characters clearly written on the book: "Purple Star Numbers".

"Purple Star Number?"

Shen Yuan had a puzzled look on his face. He had heard of Zi Wei Dou Shu, which was a well-known mysterious magical power in the Xuan Huang Realm, but this was the first time he had seen Zi Wei Xing Shu.

He Changzai held the book "Purple Star Numbers" in his hand, and said with a look of nostalgia on his face:

"My Tianyun Sect is a lineage inherited from the Xingxiu Dao. After the Xingxiu Dao fell apart five thousand years ago, the two major lineages, Tianji and Tianyun, each mastered a copy of the Ziwei Xingshu.

If one comprehends the "Purple Star Numbers", one will be able to inherit the 47th Earthly Evil Star Numbers, and can observe the future and understand destiny through celestial phenomena.

Unfortunately, our Tianyun Sect failed to gain the upper hand due to a lack of momentum, and eventually the star number magical power was acquired by the Tianji Pavilion and became the Tianji Pavilion's inheritance method.

The Tianyun Sect has been declining for thousands of years, and today there is not even a single Spirit Refiner left. The "Purple Star Numbers" has become a piece of waste paper."

After Shen Yuan heard this, his heart skipped a beat and he could hardly suppress his joy.

In the classics of the Wendao Forum, it is clearly stated that the Tianji Pavilion blessed land collapsed during the period of exhaustion of spiritual energy, and not even any inheritance was left behind.

This means that the star number magic power of the Tianji Pavilion is likely to have been lost after ten thousand years. If this volume of "Purple Star Numbers" is brought back after ten thousand years, it will almost be equivalent to a Disha magic power.

Moreover, as a method of deduction, the Disha magical power has the opportunity to directly point to the astrological avenue, which can be said to be the supreme treasure of astrology.

Shen Yuan immediately said to He Changzai, "What would you like to exchange for this volume of Ziwei Xingshu?"

The value behind the power of star numbers is unimaginable. Even if He Changzai wanted to exchange this volume of "Purple Star Numbers" for an ancient black ice, Shen Yuan would agree without hesitation.

He Changzai smiled slightly, handed the "Purple Star Numbers" to Shen Yuan, and said in an old voice:

“The astrological power has been controlled by the Tianji Pavilion. This volume of Ziwei Star Numbers is nothing but waste paper to me.

Even if it is just waste paper, how about selling it to a fellow Taoist for a Spirit Stone? "

A spirit stone!

Upon hearing the price, Shen Yuan was stunned.

You know, even though "Purple Star Numbers" can no longer comprehend any magical powers, since it has not been spread in the world, it can be called a unique method of practicing the magical powers of the Earth, and its value far exceeds the four doors that Shen Yuan just bought.

The price of a spirit stone is no different from giving it away for free.

"For free?"

A flash of inspiration came to Shen Yuan's mind, and he immediately realized that He Changzai was trying to sever the cause and effect through a transaction.

If he gave it directly to Shen Yuan, a cause and effect would be established between him and Shen Yuan, and Shen Yuan might not accept it.

But he clarified the interests involved and sold "Purple Star Numbers" for waste paper, so this was a transaction, which severed the causal relationship.

Even if something happens later, Shen Yuan will not be restricted by cause and effect.

Thinking of this, Shen Yuan looked at He Changzai deeply and said:

"If you have any requests, just tell me."

He Changzai chuckled: "The old Taoist is just acting on behalf of the Tianyun Sect, and has established a good relationship with Fellow Daoist Shen."

In the end, Shen Yuan took out a spirit stone from his storage ring and completed the transaction with He Changzai.

He Changzai solemnly put away the spirit stone, then turned around and left in a leisurely manner.

The Tianyun Sect observes the fortune without getting involved, and understands the cause and effect without making any moves.

Although there is no cause and effect, good karma is already determined.