"Oh, I'll see." As soon as he heard that it was an aura file collected by Guoan, Lin Feng immediately became interested.

This information is positioned as an SS-level file within the national security, and only innate masters and a few leaders can see it.

Lin Feng immediately looked at the file, the content in the file was very rich, the explanation of aura was very comprehensive, explaining a lot of Lin Feng's questions, and there were also many cultivation methods of aura.

The cultivation method of aura has gradually disappeared after the end of the Han Dynasty, and it is said that it is basically impossible to see the aura cultivation method, but I didn't expect that there are several aura cultivation methods collected here in Guoan.

However, judging from the annotations on the side, Guoan did not regard these aura cultivation methods as treasures, but only as an important piece of information.

Truly top-secret documents are not placed on the Internet, they are all in writing, placed in the most secure safe, and cannot be seen on the Internet at all.

Because the Reiki Gong cannot be cultivated, the Reiki is already considered to be something that does not exist, so these documents are only an important piece of information for Guoan, not the secret method of divine power.

But for Lin Feng, it was completely different, he knew that the aura existed, and he was also able to infuse the aura, so for Lin Feng, these materials were extremely important.

Among the documents about aura included in the national security, the fragmentary prose is not counted, and there are a total of 12 complete classics, namely: "Danding Xuanhuang Jue", "Golden Juice Yuan Shen Fa", "Baicao Su Sutra", "Void Spirit Taishang Induction Chapter", "Hundred Birds Imperial Sword Jue", "Qiankun Fire Tribulation", "Cold Ice Xuanyin Gong", "Shadowless and Invisible Wind Chasing Technique", "Taiyi Shangqing**", "Broken Spirit Seventeen Paths", "Dead Wood Heart Sutra", "Five Thunder Righteous Law".

Among them, "Danding Xuanhuang Jue", "Golden Juice Yuanshen Chapter" and "Baicao Su Asking Method" are all classics of alchemy and medicine, and in Taoism, this kind of exercise belongs to the Neidan school, which uses alchemy to eat Dan, so as to improve cultivation and then obtain the road to immortality.

The remaining nine classics are all kinds of spiritual qi cultivation exercises, the most powerful of which is the "Taiyi Shangqing**", the most powerful part of this "Taiyi Shangqing**" exercises, lies in its complete surname, it from the practice of qi to the fairy realm, all of them are in it, if it is in the era of abundant spiritual energy in ancient times, according to the "Taiyi Shangqing**" practice, you can cultivate all the way to the realm of immortals, which is the supreme magic method of cultivators.

Although the rest of the exercises are not as good as "Taiyi Shangqing**", they are also all spiritual qi cultivation exercises, each with its own subtleties.

In ancient times, these classics are the secret methods of the various major sects, and they are easy to never pass on, and any exercise in the world will cause a burst of bloody rain, but where did you think that in modern times, the aura is weakened, and no one can practice the secret books of divine skills.

I'm afraid that even the people of Guoan have just collected these secret methods of divine skills that cannot be cultivated as antique calligraphy and paintings, and no one knows their true value.

No, there is already a person who knows their true value, at least Lin Feng knows the true value of these divine secret techniques.

Lin Feng roughly flipped through the outlines of the twelve classics, and after knowing the general situation, he looked through them one by one.

For Lin Feng, the value of these twelve classics is really immeasurable, this is a supreme treasure, but no one knows it.

"Danding Xuanhuang Jue" records a kind of elixir, called the profit and loss pill, the profit and loss pill is based on one yin and one yang, two foreign beast inner pills as the main material, and then combined with a variety of spirit grass refining, it has a miraculous effect on the treatment of internal and external injuries, and the sword qi injury in Lin Feng's chest can be treated with only one profit and loss pill.

The alchemy technique of the profit and loss pill is also clearly recorded in the "Danding Xuanhuang Jue", and the alchemy technique is not difficult, but it is a pity that the main material of the profit and loss pill is a very scarce thing, and in modern society, there is no inner pill.

What is Inner Dan, Inner Dan is another name for Jin Dan, that is, after the alien beast becomes the Jin Dan realm, the Jin Dan is produced in the body, which is the so-called Inner Dan.

Because of the reduction of aura, the powerful beasts have long since died, and even the corpses have rotted away, and it is impossible for Neidan to stay.

And the current alien beasts, because of the reduction of aura, it is impossible to reach the realm of Jindan, and it is even more impossible to have an inner Dan.

Even if there is a Jindan Beast, with the strength of the Jindan Beast, who can kill the Jindan Beast? You must know that Jin Dan is an existence one level higher than the innate one, and a Jin Dan beast is enough to run rampant in China and no one can beat it.

It's a pity, the medicinal effect of the Profit and Loss Pill is very powerful, and one Profit and Loss Pill is enough to cure Lin Feng's internal injuries, but it's a pity that without the Inner Pill, there is no Profit and Loss Pill that can't be refined at all.

The Profit and Loss Pill is a relatively low-grade pill in the "Danding Xuanhuang Jue", and even this low-grade pill has no way to refine it now.

"Qi Nourishing Pill!"

Lin Feng saw another powerful elixir, the Qi Nourishing Pill, which was refined with five inner pills and spiritual grass, which could improve the cultivation of those below the realm of the Golden Pill.

An ordinary person who doesn't know anything, as long as he takes two Qi Nourishing Pills, it is enough to impact the innate realm, you must know that it will take at least decades for ordinary people to cultivate to the innate realm, and the effect of this pill is too terrifying, it will be against the sky.

But no matter how against the sky, it is useless, because without the inner pill, this medicine cannot be refined.

Lin Feng's eyes turned red when he saw it, the elixir recorded in this classic book was too rebellious, no matter who saw it, he would be tempted, and Lin Feng was no exception.

There are too many good Dan prescriptions in the back, but no matter how good the Dan prescription is, it is useless, the lowest Dan here also requires the use of Inner Dan as the main ingredient, and the more advanced ones also need to be medicine from the Alien Beast Yuan Shen, by the way, this kind of Dan is not something that mortals can refine at all, just look at it, if you want to refine, there is no door.

Although there is no big gain, it is indeed a long insight.

"Golden Juice Yuan Shen Fa" is different from "Dan Ding Xuanhuang Jue", "Jin Juice Yuan Shen Fa" is not to cultivate the outer Dan, but to use itself as a furnace, spiritual grass as medicine, refining medicinal power, and cultivating the inner Dan, which is a very unique cultivation method and a very unique alchemy method, but the "Golden Juice Yuan Shen Fa" is not an outer Dan, and the Dan power cultivated will be absorbed by itself and only beneficial to itself.

Lin Feng read the "Golden Juice Yuan Shen Fa" once, and then looked at the next "Baicao Su Sutra".

The pills in the "Danding Xuanhuang Jue" are mostly refined from the inner pill, while the pills recorded in the "Baicao Sutra" are mostly refined from various spiritual herbs.

For example, the "Baicao Su Sutra" records a pill called Yiqi Dan, the effect of Yiqi Dan is equivalent to Yangqi Dan, but the effect of Yiqi Dan is stronger than that of Yangqi Dan, and ordinary people take a Yiqi Dan, which is enough to impact the innate realm.

But in the same way, the main material of the Yiqi Pill is also difficult to obtain, and it requires a thousand-year-old wisteria orchid, a thousand-year-old spirit grass is difficult to find in the world, where to find this thousand-year-old wisteria orchid, because there is no spirit grass, the Yiqi Pill is also difficult to refine.

There are also many pills with amazing effects in the back, and because of the spirit grass, these pills cannot be refined.

In the second half of the "Baicao Su Sutra", the main material of the elixir has changed from the spirit grass to the spirit flesh of various exotic beasts, what thousand-year-old spirit rhino horn, what colorful snow deer skin, what three-headed leopard brain, dizzy, there is actually a use of unicorn in medicine, it is to use the blood of the unicorn as the main medicine, refining Tianlin Dan, Tianlin Dan is a top elixir, the function strengthens the body, eating Tianlin Dan can make itself extremely strong and have a strong defense, it is the favorite elixir of the refiner.

"Hey, it's the last page, Dragon and Phoenix Immortal Pill?" Lin Feng turned to the last page of the "Hundred Herbs Sutra", and on the last page, there was a kind of elixir called the Dragon and Phoenix Immortal Pill.

The Dragon and Phoenix Immortal Pill is refined with the dragon brain and phoenix pith as the main medicine, and can prolong life for 3,000 years after taking it.

3,000 years ...... How many years is a person's life, and a pill can actually prolong people's life for 3,000 years, which is 3,000 years, and it really deserves to be called the elixir of longevity.

Lin Feng's eyes were red again, and they were almost dripping blood, those pills that increased strength Lin Feng were not rare, but this Dragon and Phoenix Immortal Pill was completely different, this was an elixir that increased lifespan, if you eat one, you can live for three thousand years.

Three thousand years is an extremely long time, and being able to live for three thousand years is really not much different from immortality, at least for ordinary people like Lin Feng.

Of course, the Dragon and Phoenix Immortal Pill only increases the lifespan and allows people to live for three thousand years, but it is not necessary to live for three thousand years, there are many factors that can make people die early, if they are killed in advance, then the lifespan of three thousand years is a joke.

Despite this, it is undeniable that the effect of the Dragon and Phoenix Immortal Pill has a fatal attraction to Lin Feng.

With the Dragon and Phoenix Immortal Pill, not only can you live for three thousand more years, but your parents, family, lovers and friends can also live for three thousand more years, and the whole family can live happily together for three thousand years, what a fatal temptation, when I thought of that beautiful picture, Lin Feng was almost suffocated.

But...... Damn, where is the dragon brain and phoenix marrow Lao Tzu going to get, the two creatures of dragon and phoenix have long been extinct on the earth, not to mention the dragon brain and phoenix marrow, it is dragon poop, and now I can't find a lump.

I knew I wouldn't read this book, and I couldn't see people's grievances.

Obviously, there is an immortal pill, but there is no alchemy material, so it is strange not to be aggrieved.

Dragon's brain phoenix marrow...... Lin Feng suddenly fell silent, he remembered one thing, are the dragons and phoenixes of the Bright Continent the same species as the dragons and phoenixes of the earth?

If you use the dragon brain and phoenix marrow of the Bright Continent to refine the Dragon and Phoenix Immortal Pill, will it still be effective?

This is something that Lin Feng suddenly thought of, there are no dragons and phoenixes on the earth, but there are still in the Bright Continent.

The dragon and the phoenix are the top magical beasts of the Bright Continent.

(To be continued)