In the secret chamber.
Yang Xuan sat on the ground, holding the colorless stone in his hand. His expression was calm, seemingly unperturbed. However, his heart was in turmoil.
Under the probing of his mind, he found that the transparent stone, which was the size of a baby's fist, contained a huge amount of spiritual energy. Moreover, the density was unparalleled.
The huge amount of spiritual energy gathered and transformed from a gaseous state into a liquid state. Drops of spiritual energy were transparent and sparkling, emitting a beautiful radiance.
Hundreds of millions of drops of liquid spiritual energy formed a vast ocean, with huge waves rising from time to time.
Yang Xuan's joy was indescribable.
This was because he found that he could absorb the spiritual energy.
In the treasury, he unintentionally absorbed a trace of spiritual energy, which made the six cyclones in his body grow stronger. From this, it could be seen that the amount of spiritual energy in the stone was astonishing.
Suppressing the ecstasy in his heart, Yang Xuan calmed his mind and began to cultivate using his mind as a bridge.
In the next moment, a huge amount of spiritual energy surged out from the stone and rushed into his body, into the six cyclones.
His body and mind were free and relaxed!
For a moment, Yang Xuan felt like an exhausted traveler who soaked in a hot spring, or like the land that had been dry for a long time and welcomed a sweet dew, recovering its vitality.
This comfortable feeling was indescribable and almost made him moan.
As the spiritual energy rushed in, the cyclones grew stronger at a speed visible to the naked eye.
One minute, two minutes, three minutes …
Time passed slowly. The sun rose and set! Yang Xuan was completely immersed in his cultivation and did not care about the outside world.
Just like this, Yang Xuan sat in the secret chamber for thirteen days. The six cyclones in his body were finally saturated and automatically stopped absorbing the spiritual energy in the stone.
In the void, the golden lightning appeared again as expected.
Yang Xuan was ecstatic. Not long after, he broke through again. All of this was the effect of the colorless transparent stone.
Seven golden dragons danced wildly with monstrous power. They roared and rushed towards Yang Xuan.
Destructive energy overflowed, as if the universe was destroyed and reborn.
Boom! After experiencing the test of the golden lightning dragon once again, the cyclones in Yang Xuan's Dantian suddenly exploded and 7 brand-new cyclones appeared in Yang Xuan's Dantian.
The seventh layer of Qi Refining!
Not long after, he broke through again!
Yang Xuan opened his eyes. They shone like sharp swords, piercing through space.
Feeling the incomparably enormous power filling his body, a slight clench of his fist would cause strong winds to flow in all directions. It was as if he could even crush space. Every single movement of his was filled with enormous power.
"Come out!" Yang Xuan shouted.
With Yang Xuan's shout, a three-meter-long Fire Dragon appeared out of thin air behind him. It bared its fangs and brandished its claws, exuding boundless might and heat.
"Fire Dragon Art!" Yang Xuan uttered a name.
"Roar!" The Fire Dragon roared into the sky. The huge sound wave spread out in all directions through the secret chamber. Its power soared to the sky, causing the surrounding birds and beasts to tremble and kneel on the ground, not daring to move.
"Hahahaha," Yang Xuan laughed.
After reaching the seventh layer of Qi Refining, he had a new understanding of the use of spiritual energy.
This Fire Dragon was a new application of his Flame Art. He used boundless flames to form a Fire Dragon, causing the power of the flames to become more condensed and have the power to incinerate all things.
Although his flames were powerful before, they were scattered and not condensed. The area was too large and the power of the flames was dispersed. But now, he had formed a Fire Dragon with his flames. It was like forming a sharp blade with metal element spiritual energy, causing the power of the flames to become more concentrated and condensed.
Moreover, this Fire Dragon was completely under his control. It could be large or small, extremely flexible and flexible. It was extremely powerful.
With a single thought, the Fire Dragon danced around Yang Xuan's body, making Yang Xuan look like a god.
After playing with the Fire Dragon for a while, Yang Xuan willed it again. The Fire Dragon turned into sparks and disappeared into the air.
Yang Xuan felt the changes in his body. He was filled with power.
When he was at the fifth layer of Qi Refining, his strength was comparable to the peak of the eighth layer of Internal Force. When he was at the sixth layer of Internal Force, his strength was equivalent to the peak of the ninth layer of Internal Force. But now, he had formed seven cyclones in his body. He was very close to the peak of the tenth layer of Internal Force.
However, Yang Xuan had never fought against a Level Ten Internal Force master before, so he could only speculate.
However, with his powerful Daoist Arts, he was not afraid of anyone.
This was power!
When his power reached a certain level, his soul would also become stronger.
Then, he looked at the colorless stone in his hand and fell into deep thought.
After thirteen days of absorbing the colorless stone, he could clearly feel that it had shrunk a lot. It was probably because Yang Xuan had absorbed a large amount of Spiritual Qi.
However, Yang Xuan was more concerned about this transparent stone. What was it? Why did it contain such a large amount of Spiritual Qi?
With these questions in mind, he came out of seclusion and went to the family's library.
After he showed the token, he was not stopped. Under the fervent and respectful gazes of the guards, he entered the library.
In the huge space, rows of bookshelves were neatly arranged. On each shelf, countless books were neatly arranged.
A rough estimate showed that there were at least hundreds of thousands of books in the library.
It was as vast as the sea! This was the collection of the family's collection over hundreds of years. It could not have been done overnight.
Yang Xuan took a closer look and saw that every bookshelf had a label on it. The labels were organized neatly and neatly, making it very easy to search.
Among them, there were books on cultivation methods, martial arts techniques, the cultivation experience of senior masters, the history of the mainland, biographies of famous people, strange stories, and so on.
These were not Yang Xuan's goals, especially those Martial Skills and Cultivation Methods. In the eyes of others, they were incomparably precious, but to Yang Xuan, they were like worn-out shoes, not even worth mentioning.
Yang Xuan simply strolled past these books, not even glancing at them as he headed straight for his target.
It was a huge bookshelf covered in dust. It could be seen that no one had flipped through the books on it for a long time. There was a label on the bookshelf with the words "Mineral Resources" written on it.
Yang Xuan took a closer look. The bookshelves were filled with books, all of which introduced various types of minerals. Yang Xuan took out a book.
The title of the book was "Yan Geography".
He opened it and saw that it was a book about Yan Geography. It explained what minerals there were and how much they were stored. It was very detailed.
Yang Xuan put the book back on the bookshelf and took out another one. It was "Copper Ore Smelting".
Yang Xuan took out several books in a row. They were all books about minerals. He had no choice but to calm down and read them one by one.
He read for many days.
Fortunately, Yang Xuan had already ordered that there was no limit to the time that Yang Xuan could enter the library. Moreover, there were people delivering food every day, so there was no need to run out to eat.
However, in this short period of time, he had already read a lot of books. He also read many books about minerals, but none of them mentioned the transparent stone.
At this time, he was holding a book called "Mineral Resources Overview" in his hand.
With his current cultivation, even reading ten lines at a glance was not enough to describe his reading speed. The pages of the book were flipped, and more than ten pages were flipped.
Moreover, his mind was clear and his eyes were sharp. He had a photographic memory. All the knowledge turned into little dots of light and was stored in his brain.
"Hmm, smelting zinc ore and plating it on the surface of ironware can make ironware without rust for a hundred years! Isn't that the zinc plating technology? "Yang Xuan said to himself.
Although he did not know much about this since he came from Earth, he had heard of some of the terms.
For example, the zinc plating technology mentioned in the book he was reading had been widely used on Earth in his previous life. How could he not know about it?
Through this period of reading, he had broadened his horizons. However, he still did not make any progress on the colorless transparent stone.
After flipping through this book, he took out another one. It was a book called "Collection of Unusual Flames of Heaven and Earth". It talked about a few rare flames in Heaven and Earth.
After flipping through it, he still did not learn anything. Yang Xuan frowned and said nothing. He was still patient and wanted to read the next book. That was also his character. He would not change his mind once he had set his sights on a goal.
Suddenly, due to the slight shaking of the bookshelf, a book fell from the top of the bookshelf. It was covered in dust and there were even spiders crawling over it. It looked really shabby.
Yang Xuan picked it up and patted the dust on it. He wanted to see what kind of book it was but found that there was no name at all. When he opened it, it turned out to be a mining diary and experience written by a disciple of an unknown generation.
Yang Xuan flipped through it casually. Suddenly, a record came into his eyes.
"Today, I went deep into an unknown cave in the Mi Lian Valley. I did not find any trace of the Dark Feather Iron Mine. However, I found a colorless transparent stone. It was very beautiful. I took two pieces out as a souvenir!"
Yang Xuan was overjoyed. He finally found the record of this stone.
In surprise, he quickly continued to read.
However, for a long time after that, this unknown senior only recorded the various minerals he had found, but did not mention the transparent stone at all.
Fortunately, this diary was very thick. Although the record was messy, it was also very detailed. After flipping through it for a long time, Yang Xuan found the record of the transparent stone.
"After sorting out the ore, I found that there were two colorless transparent stones. I began to study them. First, I checked the records of the ancestors. I didn't find anything. Then, I carefully studied it and found that there was no metal in it. It seemed to be a useless stone. However, this stone was transparent and clear. It would be good to take it back for Feng 'er to play with. I then put it in the box! "
Yang Xuan flipped through the diary again. Until the whole diary was finished, he did not find the slightest record of this stone.
It seemed that this stone was not known to outsiders at all.
This was not surprising. The world was big and there were all kinds of strange things. No one dared to say that they knew everything in the world.
Although he did not understand what this stone was, Yang Xuan was still overjoyed because he got a more important message from it. That was the Mi Lian Valley.
According to the records of this senior disciple, there was a large number of such stones in a nameless cave called the Mi Lian Valley.
Where was the Mi Lian Valley?
Yang Xuan went straight to the mainland geography book collection area.
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