On the way back, Fang Ruyan kept shouting that he wanted to go to the forest to hunt for treasure, Li Yunchen didn't agree, since he learned that it was the Silent Annihilation Forest, he broke off the idea of going on an adventure.

The Zigang mining area was subdued, and the entire western part of Wujin Mountain was under the control of the human race, and the people in the mine were mainly anti-guest, patrolling around like the old demons, urging mining.

There are many demons in Wujin Mountain, and people are constantly oppressed because of their long-suppressed anger, and the Wujin mines handed over in a month will reach 10,000 catties! This kind of quantity can not be done even if the mine digs for a year.

And in the past month, Li Yunchen has been participating in Zen alchemy, in addition to cultivating the second level of Guiyan, because he has just touched the doorway, he is not very familiar with it, so he has to strike while the iron is hot and keep running-in.

As for Fang Ruyan, it is difficult to see her, and she has been looking for treasures everywhere with Panlong Stone all day long, and she has not been in the mine a few times.

"There are so many black gold mines, if they are transported to the Demon Palace, they will have to be divided several times. Pan Zhen looked at the large pile of black gold mines, but he was a little worried.

Ye Zishan pursed her lips and smiled: "Although it is a little troublesome, but there must be a lot of money and weapons in exchange, in the past, what we secretly hid in the mine was only a hundred catties, but now it is more than 10,000, and I don't have to live a hard life anymore, when the time comes, I will choose a satisfactory weapon for Brother Pan." ”

Pan Zhen smiled, then looked towards the innermost cabin and asked, "Is Gongzi Li still in retreat?"

Ye Zishan sighed lightly: "Yes, it's been a month, and I haven't even seen a figure, how can I afford to cultivate my body day and night." ”

Pan Zhen also showed a little worried, and said: "It's really crazy, if I were so diligent, I'm afraid I would have already broken through the Wendao realm." ”

"What bad things do you say about me while I'm not there?" During the conversation, Li Yunchen opened the door and walked over. This month-long retreat to ponder alchemy not only did not feel tired, but the soul was nourished and strengthened.

Seeing that Li Yunchen's face was red and his complexion was good, the previous worries of the two were swept away.

"What's the matter, it's just that Shan'er hasn't seen you for a month, and she misses you urgently, and she wants to see you in a hurry. Pan Zhen smiled.

"Brother Pan, what are you talking nonsense!" Ye Zishan lowered her head, and her face suddenly turned red.

Li Yunchen shook his head, smiled helplessly, and then his eyes fell on the large pile of black gold mines in the mine, and asked curiously, "What is that hill?"

"Oh, that's the black gold mine that the little demons have dug in the past month, and it's 10,000 catties. ”

After listening to what Pan Zhen said, Li Yunchen couldn't help but be shocked, he had been in retreat for a month, and he didn't know anything about what was happening, so he couldn't help but be at a loss when he saw the mountains of black gold mines.

"So many, it seems that those little demons have been squeezed quite hard. ”

"That's right. Pan Zhen was very relieved and said: "We are going to transport these black gold mines to the Demon Hall in batches in exchange for money and goods. ”

"What did the Demon Palace do when it bought so many black gold mines?" Li Yunchen was puzzled.

Pan Zhen said: "Of course, the black gold iron is extracted from it, I heard that there is an alchemist in the demon hall, and every time the black gold ore purchased is refined by him." Because the refining of black gold iron is extremely difficult and in great demand, it will be purchased in large quantities. Don't look at the 10,000 catties here, after refining, it may not be a catty. ”

Li Yunchen's eyes flashed with a look of wisdom, Wu Jin Tie cherished it very much, it could be used as a material for a high-grade weapon, and the Divine Soldier Demon Fire Sword refined by Duan Tianling that day had this thing in the raw materials, and it was as much as a few hundred catties. Thinking of this, he sighed with emotion, and had to admire Duan Tianling's methods.

"Then what can you get in exchange for a pound of black gold iron?" asked Li Yunchen with a sly smile.

Pan Zhen was stunned, and then said slowly: "Don't talk about a catty, even if it is half a tael, you can come back with a spiritual weapon, or even a spiritual treasure!"

Li Yunchen's eyes lit up, if he used alchemy to extract the black gold iron from it, then the profit would be greatly increased, and he would not have to work hard to ship it in batches.

"These black gold mines don't need to be transported to the Demon Palace, leave them to me. ”

"What did you say?" Pan Zhen was a little confused.

Li Yunchen said: "You just step up and urge the little demons to mine, and these black gold mines will be handed over to me for the time being." ”

Pan Zhen and Ye Zishan are both confused, there are many black gold mines, if they don't start moving now, they will only accumulate more and more, it can be seen that Li Yunchen has a weird smile on his face, and the two of them have no choice but to do so.

After the two left, Li Yunchen walked to the hill where the black gold mine was piled up, sacrificed the enchantment, and the three flames turned into a sea of fire, surrounding the hill.

The method of alchemy flashed in his mind one by one, and finally found a way to refine the black gold iron, after a general browsing, Li Yunchen found that the requirements were not high, and he could barely refine the alchemy technique he had just started.

In fact, the amount of black gold iron that can be refined in 10,000 catties of black gold ore is determined according to the level of alchemy, and the refining of black gold iron is not only affected by the ability of alchemy, but also affected by the refining method.

As for the refining method, Li Yunchen didn't have to worry at all, the alchemy method that Duan Tianling gave him was perfect and unsurpassed. After the enchantment was activated, Li Yunchen began to manipulate the flames and calcine the black gold mine.

The raging fire flooded the black gold mine, and the hill gradually melted, but slowly, and the calcination of a day and a night only reduced the volume by a tenth.

"It seems that the flames of the Red Flame Realm are not good, if you use that pyramid to refine, you will definitely be able to complete it in less than a day. Li Yunchen complained and continued to burn.

It took three days for Xiaoshan to be completely smelted, and the 10,000 catties of black gold ore were finally only a small pile, less than a hand.

The first alchemy lasted so long, but Li Yunchen was only a little tired, and he didn't feel soul depletion, and it seemed that his alchemy had also improved a lot. The black gold iron powder refined from these is small and gray in color, and Li Yunchen holds it in his hand, which weighs three catties.

"The alchemy method is really magical, if my alchemy is stronger, I'm afraid ten catties can be refined. Li Yunchen was still a little dissatisfied with the Wujin Tie into the robbery pill.

"It's just that they asked them to urge the little demon to mine, why haven't they come back after three days? Could it be the Zigang Demon King?" Li Yunchen felt weird, and the more he thought about it, the more afraid he became, he had been busy refining Wujin Iron, and he actually ignored the safety of Pan Zhen and the others.

After recovering the enchantment, Li Yunchen rushed towards the center of the western mine.

When he arrived at the Zigang mining area, his tense heart was finally relaxed, Pan Zhen and the others were safe and sound, and they were still urging the little demon to mine. At the same time, the elusive Fang Ruyan was also at the scene, squatting on the ground and not knowing what he was probing.

"Little brother, why are you here?" Pan Zhen glanced at Li Yunchen, and then turned his gaze to the piece of land in front of him.

"I'm sorry to say that you haven't been back for three days, and I thought something had happened. Li Yunchen saw his relaxed expression, and immediately rolled his eyes.

Ye Zishan smiled and said, "You can't blame Brother Pan, the main reason why we didn't go back is because this land is unusual, we have been mining for three days, but we haven't been able to dig it." ”

Li Yunchen looked in the direction Ye Zishan pointed to, the piece of black gold in front of Pan Zhen was very different, much brighter than the others, and it was very hard, and the mining weapons of the little demons were broken several times, and they couldn't be chiseled.

"This is the first place that Miss Ruyan discovered, and she said that there was a treasure here, so we have been trying to find a way to mine it for three days. Pan Zhen said.

Li Yunchen walked to Fang Ruyan's side, and the broken knife behind him reacted slightly, although it trembled, it was much gentler than before.

"You're just in time, use the holy soldiers to smash this piece of land open!" Fang Ruyan saw Li Yunchen appear, and immediately urged, she held the Panlong Stone that emitted red light, and her big eyes showed longing, which made people unbearable to refuse.

"Is there really a treasure down here?" Li Yunchen suppressed the broken knife and ordered everyone to retreat, Pan Zhen and Ye Zishan were no exception, away from a hundred meters.

"Boom!"

The demon arm slammed into the black gold mine, and the ground shook, and many of the little demons fell to the ground.

After a few more punches, the Wujin Mine only shook a few points, and it did not crack, Li Yunchen was so frightened that he couldn't even break through the power of the demon beast, how hard was the Wujin Mine here?

Li Yunchen took a step back, and had no choice but to sacrifice the demon bell as Fang Ruyan said.

"Boom!"

The demon bell in his hand quickly became larger, like Dayue pressing down and smashing on the black gold mine, and the roar spread along with the sound of the black gold mine shattering.

"What's that bell?" asked a little demon in horror.

"I don't know, but Elder Zigang was killed by this bronze bell. Another little demon replied that Li Yunchen was also present on the day he entered the Zigang Mining Area, and he was still a little scared in retrospect.

"It's really hard enough, and it can withstand the might of the holy soldiers. Li Yunchen pressed the demon bell down again and smashed it on the ground, and under several bombardments, the black gold mine finally couldn't bear it and completely cracked. The cracks spread like lightning, and the black gold mine sank, and the area began to collapse.

Li Yunchen took back the demon bell, and at this moment, the reaction of the broken knife became strong.

This piece of underground kept coming out of golden light, illuminating a little dazzling, Li Yunchen looked into the depths, and saw a pile of golden stones in front of him.

"What kind of ore is this?" Pan Zhen also poked his head into it and said excitedly. As for Fang Ruyan, he didn't say a word, and went straight into it before everyone.

Li Yunchen followed closely, and at the same time probed with his divine sense, when the method of alchemy flashed in his mind, and the moment the picture froze, a strong sense of suffocation hit.

Indestructible Stone!

Li Yunchen couldn't suppress the excitement in his heart, and almost screamed. This is an extremely rare ore, a piece that is rare to come across in a thousand years, and it is as solid as a rock. If this weapon is added to the refining weapon, the hardness can be called invincible, and the iron is as sharp as clay. This stone can also be refined into an immortal gold pill, after taking it, it has the effect of refining the flesh, and can cast an immortal golden body.

For the people of the mining village who have never heard of the immortal gold stone, they naturally do not know its preciousness, and they are all confused, including Pan Zhen. But Fang Ruyan recognized it at a glance and smiled from ear to ear.

"It's rare to find an immortal gold stone in a thousand years, there are so many here, and this time it's a big profit. Fang Ruyan stroked the golden stone while using a magic weapon to block the dazzling golden light.

"The outer black gold mine is so hard just because it is affected by the immortal gold stone, even the power of the demon beast can't break it, how hard will the real immortal gold stone be?" Li Yunchen was also excited, and thanks to the alchemy method given to him by Duan Tianling, otherwise the treasure would not be recognizable in front of him.

"One, two, three......" Fang Ruyan kept counting, although each piece was only the size of a thumb, judging from the rarity of the indestructible golden stone, it was enough.

"One hundred and twenty-five, one hundred and twenty-six, one hundred and twenty-seven!"

A total of one hundred and twenty-seven pieces, which made Fang Ruyan smile widely, so many immortal golden stones, if they were spread out, it would inevitably cause a big sensation, and even the holy lands would be red-eyed.

"This thing, like the demon bell, can't see the light, if it leaks out, the entire Ugin Mountain will be slaughtered. Li Yunchen reminded him later.

"Of course I do. Fang Ruyan reluctantly got up, then stepped aside, and said to Li Yunchen: "It's too unsafe to put the Immortal Golden Stone here, use the holy soldiers to mine it quickly." ”

Li Yunchen also had this intention, he slammed down with a demon bell and smashed it on the gold stone, and the sonorous sound was endless, but the immortal gold stone did not move, and it was not damaged at all.

After several more bombardments, Li Yunchen tried his best, but it still didn't work.

"Sure enough, it's hard enough, I don't believe that even the Demon Emperor Holy Soldier can't smash a piece!"

The demon bell was driven to grow several times larger, almost breaking the entire underground, and then like a mountain pressing down, all the weight fell on that small piece of gold and stone.

Underground, the dark copper-colored divine light and golden light continued to impact, and after a long stalemate, a small piece of immortal gold stone finally couldn't withstand the divine power of the demon bell, and broke away and fell to the ground.

Fang Ruyan was overjoyed, and was about to reach out to take it, but was preempted by Li Yunchen.

"You...... Why are you robbing me of something?" Fang Ruyan exhaled.

"This is what I mined, how did it become yours?" Li Yunchen unceremoniously collected the small piece of gold and stone into the robbery pill.

"This is what I found!" Fang Ruyan argued, "Okay, anyway, there are so many gold and stones, it is nothing for you to let you have a piece, you can mine the rest for me." ”

"You don't have a backache when you stand and talk, this immortal stone is extremely hard, it took me a long time to get a small piece down, let me mine it all, I don't have that ability. After speaking, Li Yunchen flew out of the ground, leaving Fang Ruyan and his feet so angry that he stomped his feet.

"How's it going, little brother?" Seeing Li Yunchen come out, Pan Zhen hurriedly went over to ask.

"There are a lot of rare ores down here, but it's hard to mine them, and these little demons can't do it at all. Li Yunchen sighed, "Brother Pan, don't reveal this matter, the gold and stone will be placed here for the time being, and I will find a way to mine it in the future." ”

Pan Zhen is not stupid, he can vaguely guess the importance of the immortal golden stone, and he can't leak anything. However, at this moment, Li Yunchen's face suddenly changed drastically and he roared.

"Who!"

Above the sky, a powerful demonic aura spread, and the strong coercion made Li Yunchen's pupils shrink into a needle.