The hall where Lin Hao is located is very peculiar, it is a cylindrical super large room, the diameter of the left and right is about 30 zhang, and the height is also 4 or 5 zhang high, and the surrounding blue stone walls are inlaid with light red crystals, and there is a thin layer of white sand on the ground, which makes the whole hall appear clean and tidy.

There are three passages evenly distributed around the hall, two of which are engraved with the word "Qi" and one "Dan" in ancient script, respectively, and the last passage is empty, and there is no sign nearby.

After Lin Hao glanced at it, he hesitated a little and walked towards the passage engraved with the word Dan. The passage was not long, and after a dozen steps, a slightly larger room appeared at the end of the passage. There was a long table in this room, and an old man with a red face was standing at the table, looking at Lin Hao with a smile.

The old man shook his head and said, when he first came in, Lin Hao had already noticed that the Heavenly Eye Technique had no effect on the old man, and he couldn't see the depth of the other party, which showed that the old man was a master of the foundation building period, how dare he slack off!

So, he hurriedly saluted and said: "The junior has seen the uncle, the nephew is indeed the first time to come, and I ask the uncle for some advice!" Lin Hao lowered his posture.

If there's anything you don't understand here, just ask. In addition, my surname is Zhou, and you can call me Uncle Zhou or Old Zhou. Don't want any teachers and uncles, the old man doesn't like to hear this!" the old man said to Lin Hao, as if he was very concerned about this.

The younger generation wants to find some formulas and books related to the elixir, and wants to study the way of alchemy. Lin Hao tried his best to make his words appear tactful and roundabout, not wanting to attract this person's attention.

The recipe and book of alchemy, go up this staircase!" To Lin Hao's surprise, the old man didn't have any intention of asking him, and after he casually took out a black token and issued a Dao Law Decision, a stone staircase leading to the roof appeared out of thin air in the open space behind him and between the shelves.

Lin Hao was overjoyed, and hurriedly walked to the vicinity of the stairs, and was about to move, but this old man suddenly showed a cunning look.

"Looking at the collection of books on the second floor, one hour charges a low-grade spirit stone, and it is not allowed to take the original out of here, if you want to copy the content, you need to pay another copy fee of ten spirit stones per copy. ”

Before he stepped on the staircase, Zhou Lao, who was already behind him, said the relevant regulations unhurriedly, which made Lin Hao's figure stagnate, and he almost wanted to scold.

This fee is also too high, you must know that a low-level disciple can only earn twenty or thirty spirit stones through various jobs in a year! Counting the daily consumption and expenses of various cultivation, the spirit stones that can actually be saved are only a few pieces.

Lin Hao threw it back without looking back, and threw a low-level spirit stone into the old man's hand, and he quickly climbed to the second floor.

Take a closer look at the things on the second floor. Although the house on the second floor is not small, there are very few things placed there. Two black bookshelves, a table, and a broken chair. There were twenty or thirty yellowed old books on the shelves, and there were also bundles of bamboo slips on the table, and two jade tubes that could no longer be seen in their original colors.

Lin Hao was hit hard by the scene in the house. If it weren't for Xu Lao's unfathomable mana, he would almost have the urge to go downstairs immediately and grab the other party's collar and question him fiercely. Lin Hao calmly walked to a bookshelf, then took out an old book at random and looked through it carefully.

"The Five Elements of Heaven and Earth, the Golden Needle Piercing Position, Can Transform the Essence and the Essence ......" He only read a few sentences at the beginning of this book, and he was immediately surprised, and he couldn't help but close the book and look at the book cover.

The five huge words of "Golden Needle Secret Technique" appeared in front of Lin Hao's eyes.

Lin Hao's face was ugly. It's not that this book is bad, the content recorded in this book is indeed a rare secret method of healing in the world. But what does this golden needle technique have to do with alchemy? What annoyed him even more was that he had already read the book countless times from Master Han, and he could even memorize it backwards. This is obviously a secular book of medicine, how can it appear here in a grand manner?

A series of questions appeared in Lin Hao's mind, and a trace of an even worse premonition shrouded his heart. Got caught!

Lin Hao flipped through the remaining old books one by one. When the last book was closed, the expression on Lin Hao's face was as black as before the storm.

None of these twenty or so books are books of alchemy, and all of them are books for the secular world. At this time, Lin Hao had the urge to scold.

"When the hour comes, if you look at it again, you will have to add another spirit stone!

When Lin Hao heard this, he was a little speechless, just like this pile of garbage books, he also wants to collect spirit stones, but when his eyes turned to the items on the table, he still took out another spirit stone from his body and went down from the staircase.

Xiaoyou continue to watch, the old man doesn't bother! Ignoring the old man, he hurriedly walked to the table, this time he looked at the bamboo slips on the table, obviously much faster than just now, and only look at the general content, no longer read sentence by sentence in detail.

After turning over all the bamboo slips, Lin Hao piled them back and sighed lightly.

This time, the recipes for several pills and some dispensing tips recorded on these bamboo slips are really true. But it's a pity that judging from the composition of these pills, these are all elixirs with similar effects to Lin Hao's "Huanglong Dan" and "Golden Essence Pill", and for Lin Hao, there is no effect at all.

In this way, Lin Hao's only hope was pinned on the two fist-sized jade cylinders, hoping that the things recorded in them would not let him go home empty-handed. Lin Hao picked up a jade cylinder and blew it gently, revealing his true green face.

He pressed the jade tube against the corner of his forehead, and his mind slowly sank into the inside of this thing, and a method of refining the pill appeared in front of him, which turned out to be the refining method of the Zhuji Dan that Lin Hao had dreamed of, from the raw materials to how to condense the whole process of the pill, which made him surprised and delighted.

He didn't bother to look at the other jade cylinder for a while, and hurriedly browsed through the entire content with his mind first. But when the words "must be tempered with innate true fire in order to become a pill" passed through his mind, Lin Hao was stunned, and he felt completely dumbfounded.

The innate true fire is the Taoist Gang fire that only monks can have during the foundation building period, and it is a basic magic energy that immortal cultivators after foundation building are born with. It will gradually increase in power with the monk's refining and meditating, and even after the Dan Formation Period, this true fire will turn into the legendary fire of the three flavors, which can burn all things in the world.

But this kind of innate true fire, how could Lin Hao in the Qi refining period use it! Only after building the foundation can he use it.

However, if the foundation is built, it must be refined into the Zhuji Dan, and the innate true fire after the foundation is built cannot be lacking, so that Lin Hao is depressed and has the urge to hit the wall!

Finding other monks in the foundation building period to help with alchemy is even more impossible. This is equivalent to exposing the secret of the spiritual liquid to the other party, and at that time, I am afraid that the helper invited will become the murderer who wants his own life.

Lin Hao stood in front of the table and was distraught for a long time before he took the jade tube off his forehead and put it back in its place. Then absentmindedly picked up another jade cylinder and wiped it a few times, revealing a fiery red color.

The matter of Zhuji Dan can only be considered later!Let's see what the contents of this one are, maybe there will be other wonderful pills in it!" Lin Hao is also a decisive and decisive person, and immediately put aside the advance of Zhuji Dan, and checked the red jade tube, hoping to give himself a big surprise.

Dingyan Dan, as soon as Lin Hao's mind entered it, these three words appeared in his mind. made him feel a little bad for a moment, but Lin Hao still comforted himself. "Although the name is so, the effect of the elixir may not be what I think, maybe there are other miraculous effects!"

But the next few sentences completely shattered Lin Hao's extravagant hope, "It can make youth last forever and appearance lasts forever" This is the description of the efficacy of this pill, and there is no other effect!

As if frozen, he stood motionless and did not say a word. But in his heart, he could no longer suppress the evil fire that was rising, and secretly cursed.

The time has come again, if you ...... again"

It's down!"

Lin Hao didn't have much to do with giving the other party a spirit stone for nothing this time, so he picked up the jade cylinder containing the Zhuji Dan refining method and prepared to leave here.

But as he walked at the top of the stairs, he hesitated. I felt that although that "Fixing Yan Pill" did not help to improve mana in the slightest, it seemed that it could still be sold to other immortal cultivators. And the most important thing is that this Dingyan Pill does not need the so-called innate true fire, and now he can mix it.

Thinking of this, Lin Hao turned around and ran back to the table, grabbed the red jade cylinder in his hand, and then quickly returned to the staircase and went downstairs.

How is it, Xiaoyou! Is there any gain? Old Zhou, is it really the place where the secret recipe of the pill is stored in this door? Why are they all some rags.

Listening to Lin Hao's words, he couldn't help but laugh. Since the old man took care of this place. Almost everyone who has just arrived here will say the same thing to the old man, but if you want to know the reason for this......" The old man deliberately dragged out his tone.

Without saying a word, he "snapped" and "snapped" twice, and put the two jade cylinders in front of the old man's table.

The junior originally wanted to copy both jade cylinders, but now that he looks at it, the spirit stones don't seem to be enough! In this case, the junior still only copies one of them, and the other junior will send it back. Lin Hao hasn't been in the secular world for so long.

Xiaoyou wants to make two copies? Zhou Lao was overjoyed and his eyes widened. Originally, yes, but the juniors still want to know the answer to the question just now, and it doesn't seem to be enough!"

Hehe, since Xiaoyou is so refreshing, of course the question just now is free. The old man copied the two jade cylinders in his hands in a hurry, and took out two white jade cylinders from the shelves behind him, and hurriedly copied them, looking like he was afraid that Lin Hao would regret it.

The copy is complete, take it!" The old man's movements were extremely agile, and in Lin Hao's stunned eyes, he had already finished copying the jade cylinder, and then threw the copy in front of Lin Hao's eyes. Then with a look that you don't take out the spirit stone quickly, he looked straight at Lin Hao.

Lin Hao wanted to say something, but he still didn't say it. After a little silence, he cleanly took out twenty low-rank spirit stones from the storage bag and handed them to the old man without saying a word.

The old man took these spirit stones with a smile on his face, and looked at Lin Hao again with the eyes of a big financier.

Xiaoyou is so wealthy, in fact, the answer is very simple, most of the elixir formulas have long been lost. This is not only the case for us in the Yellow Maple Valley, but also for several other families, and even the entire Immortal Cultivation Realm!" the old man said slowly.

In fact, Xiaoyou calmed down and thought about it, and you will understand. What is the value of the elixir formula? Of course, it is because we can turn the corresponding heavenly and earthly treasures into elixirs for immortal cultivators like us. ”

But Xiaoyou has not thought about it, the heavenly and earthly treasures in this world are very limited, and the number of immortal cultivators has never decreased, which has caused the various raw materials recorded in the formula to gradually become scarce, and when the people in the immortal cultivation world have noticed the seriousness of this problem, the heavenly materials and earthly treasures in this world have long been excavated.

After a few more tribulations in the Immortal Cultivation Realm, those elixir formulas gradually disappeared into history, and only a few were left. And Tsukidan is just one of the ones that survived.