The aura is as rich as mist, filling the small space, it feels like a lot, but the space is limited, and there are five people, everyone can take a breath together, and basically the aura concentration can drop by half instantly.

The endless stream of aura is constantly replenished, this aura is not an ordinary heaven and earth aura, but the five elements aura, the replenishment speed is extremely fast, just a little decreased, immediately replenished, the aura concentration fluctuates constantly.

For such a high-concentration aura environment, as well as pure and attributed aura, Lin Feng and the four of them naturally seized the opportunity not to miss it.

Fang Yan quickly frowned again: "The aura conversion efficiency is too low, the aura produced is not pure enough, and the attribute deviation is ......."

For Lin Feng and the four of them, these five elements aura can be regarded as a treasure, but for Fang Yan, it is not as impressive at all, and it is not even as good as the ordinary aura that spreads all over the heaven and earth.

Although the aura of heaven and earth is different because of regional environmental factors, in the ordinary environment, the aura is relatively thin, the spiritual power is not pure enough, and there are many problems, but these aura is derived from the cycle of heaven and earth, and it itself contains great creation, although it is mixed, it contains the vitality of creation.

The aura produced by the sandworm mining machine like an assembly line, the quality looks good on the surface, but it lacks natural ingredients, but the problem is more serious, just like the difference between feed pigs and farm pigs, the connotation is the most important.

Did Lin Feng and the four of them find any of the problems, Fang Yan didn't know, he saw that he had to think about how to change them.

"The theory of yin and yang and the five elements is flawed, and in order to improve the efficiency of the conversion of aura, we must first improve the theoretical deduction. Zhi Brain's answer made Fang Yan helpless.

In his previous life, he was just an ordinary person, he didn't know much, and his intelligence relied on that little incomplete thing and relied on the wisdom brain to deduce, and the initial low-level theories could be quickly improved, but after the middle and late stages, the theoretical deduction became more and more difficult.

Zhi Brain and Fang Yan are one, although it can deduce and improve on its own, but it also has to rely on what Fang Yan has seen and heard, and make progress on this basis, rather than self-improvement, and deduce it from the rules of heaven and earth out of thin air.

If that really happens, then the Zhi Brain is no longer just the Zhi Brain, but the omnipotent system in the novel, Fang Yan also has to be careful and give birth to other thoughts, studying whether there is someone behind the Zhi Brain who is at the mercy of him as a pawn, or whether this is a dream in itself.

"Say a thousand ways and ten thousand, and in the end, it is my own strength to improve is the king. Spiritual power as energy, maybe you can study it first, as long as you understand its essence, whether it is refining or cultivating, you can find a way, and it will become easier to improve. After pondering for a long time, Fang Yan finally decided to study the aura first.

The Qiankun Jue practice outline is generated by following the four steps of practice, refining qi and nourishing the spirit, gathering the five qi and three flowers, and perfecting the Qiankun Jue from those practice theories and conjectures known in previous lives.

Fang Yan is also most familiar with the theories of the five qi in the chest corresponding to the five elements, yin and yang, and the research direction also starts from himself.

Its own spiral true qi is yin and yang, although the power attribute is simple, it is the simplest avenue, but it is more profound than the five qi, after all, theoretically, the five qi is just derived from yin and yang.

Fang Yan's yin and yang true qi can be regarded as the two qi of life and death, this theory of life and death and mutual restraint, he also knows a little bit of skin, it can be said that he only knows what it is, he doesn't know why, he can barely understand a little, but he can't systematically sort out a set of detailed theories.

Life and death have great creation, too high-end, yin and yang contain the infinite avenue of heaven and earth, and Fang Yan can only choose two opposing forces to study from them, such as water and fire spiritual power.

A spiritual power gathered in the palm of his hand, quickly absorbing the surrounding spiritual energy and gradually growing stronger, and after a while, it condensed into a spiritual power ball the size of a ping-pong ball.

With a turn of spiritual power, it differentiates yin and yang, and evolves into two qis, water and fire, chasing each other and spinning, evolving into a simplified Taiji.

"Zhi Brain, I want to know the essence of this water, fire, and aura at this moment, and the principle of their transformation of birth and death. Fang Yan said, as soon as his thoughts turned, the spiritual power ball in his hand changed, and the two qi of water and fire evolved into a Taiji diagram, and the power of the two was born and destroyed, and the cycle was endless.

When the two spiritual qi were completed in the cycle, Fang Yan felt that these two powers had changed, but he couldn't figure out the details of them, but he could feel that these two spiritual qi had been refined, and between the cycles, it seemed that his true qi had also been involved.

"Collecting information, calculating, please wait ......" After Zhi Brain finished speaking, there was no movement, and I don't know how long it will take to complete the calculation.

The Taiji Diagram in his palm was still in constant motion, and unconsciously, Fang Yan felt that these two spiritual qi seemed to have transformed towards true qi.

"After the calculation, the spiritual power is refined, the essence changes, and the biological active energy is used to affect the spiritual power change, and the circulation rule is the active energy transfer ......" A lot of information given by the Zhi Brain made Fang Yan frown.

"That is to say, my Yin Yang Spiral True Qi is also because of the bioactive energy?" Fang Yan seemed to have an understanding, and tried to ask. "What is active energy?"

"The spiral true qi foundation is the biological active energy transformation cycle, which is formed in combination with other energy circulation rules, and the active energy is life energy, which can be understood as the core ...... biological energy field" Zhi Brain also seems to be unable to explain the root cause of this.

Fang Yan realized something, thinking about the energy field, and a faint spiritual light flashed, but he couldn't catch it, and he couldn't figure it out.

When I came back to my senses, the coordinates on the sandworm mining machine had jumped to more than 400 miles, and the time had already reached night, and in another hour or so, it would be time for the sub-session.

Fang Yan secretly calculated to himself, and waited another hour for the sandworm miner to drill out of the ground.

In the dark grassland, there was silence, and the sandworm mining machine came out of the ground, alarming the surrounding demon beasts and retreating in fright.

The five of them returned to the grassland, Fang Yan collected the mining machine, looked at the sky, gave a word, and set up a formation to collect gas.

The night suddenly darkened, and a light shrouded Fang Yan's body, feeling as if the only glimmer of light around him had all converged. Then, as if turning into white gas, these lights drilled into Fang Yan's nostrils, and they were all sucked away in an instant.

The whole process of gas extraction is completed in a moment, the speed is fast, and it is also domineering, after the Taiyin Gang Qi enters the abdomen, it has to be refined internally, this time the amount of gas extraction is far better than at the beginning, after storage, according to the current refining speed, it can still only last for half a month.

"Don't you have anything to tell me?" After Fang Yan finished his work, Senior Sister Hu opened her eyes and looked at him.

Fang Yan stepped forward with a calm face and sat down: "What did you say, what do you want to know?"

Senior Sister Hu's anger swelled up, and she almost exploded, and finally took a deep breath and held back: "Don't you think you have a problem?"

In the end, Senior Sister Hu stared at Fang Yan's eyes, as if she wanted to see something.

Fang Yan was silent for a moment, then suddenly raised his head and said, "I don't think there is anything wrong with me, then you have been very angry recently, as if you are always targeting me." ”

Senior Sister Hu squinted her eyes and said, "It's not that I'm targeting you, but you've been getting more and more strange during this time, I don't think you haven't found out." ”

Fang Yan was silent, his face was calm, and he didn't see the slightest change in his expression.

Senior Sister Hu continued: "Since you came back, I have felt that you are very strange, your Demon Lin Sword was originally evil, and it has changed since you took it back. ”

"Are you saying I'm bold, or what?" A smile appeared at the corner of Fang Yan's mouth, "I think you're thinking too much, in that case, it's actually pretty much the same to be you." ”

Senior Sister Hu looked like she was going berserk, and roared in a low voice: "Fang Yan, you are asking for your own death, there is a problem with that sword, and when you come back from the Taiwu Secret Realm, you will have a problem, at that time, it just didn't change much, I also feel that you may have experienced the third secret realm, and your mood has changed, but now I think that is not the reason, but the problem of the sword, the evil spirit of the sword is too heavy, affecting you, do you know?"

Fang Yan stretched out his right hand, the red light flashed in his palm, and the three-inch-long Demon Lin Sword was suspended in the palm of his hand, and the sword was wrapped in flames.

Senior Sister Hu stared at the Demon Lin Sword for a moment, and suddenly showed a look of horror: "What an evil sword, there are countless souls in it, what have you done? What is the secret of this sword, Fang Yan!"

The Demon Lin Sword returned to normal, Fang Yan caressed the sword body, the flames were included in the sword body, the Demon Lin Sword became ordinary, and it looked like the Fire Lin Sword, but this sword seemed to be bland, but Senior Sister Hu showed a look of horror, trying to turn her head away and look away, but those eyes, looking at the Demon Lin Sword, couldn't move away, as time went by, those eyes became more and more weird, and it seemed to be full of endless greed for the Demon Lin Sword.

"It's beautiful, isn't it?" Fang Yan looked at Senior Sister Hu's greedy eyes, and the smile on his face was even worse. "It's a wonderful color, a perfect sword, and with it, you have endless possibilities, and you have power you can't imagine. ”

Senior Sister Hu's face struggled, and she tried to say, "Take it ...... Give me...... No...... Put it away......"

After saying it intermittently, the greed in Senior Sister Hu's eyes became heavier, and she stretched out her hand tremblingly, wanting to grab the Demon Lin Sword.

Fang Yan smiled even more, his hands were spread, the Demon Lin Sword hung between the palms of his palms, and at the moment when Senior Sister Hu stretched out his hand, he closed his hands, and the Demon Lin Sword disappeared without a trace.

Senior Sister Hu grabbed Fang Yan's hand, opened her mouth wide for a moment, took a deep breath, and looked frightened.

With a smile on his face, Fang Yan looked at Senior Sister Hu and waited quietly.

Senior Sister Hu breathed rapidly for a moment, gradually calmed down, and after a long time, she recovered, looking at Fang Yan with a look of fear, her face was as pale as paper.

"How do you feel, do you have anything to say?" Looking at the smile on Fang Yan's face, Senior Sister Hu couldn't get angry, but instead looked at Fang Yan with a shocked expression, as if she had seen a ghost.