Zhao Feiyu once again used his divine soul to scan the pile of weed-like herbs, those herbs all exude aura of various attributes, but they are mainly based on the aura of grass and trees, and those aura of chaotic attributes are mixed in it, which is very difficult to distinguish.

And this is one of the reasons why refining pills is the most difficult.

Most of the herbs and trees contained in many herbs are not very pure, and there are many impurities.

Although refining low-level pills does not require very high purity of the herbs and trees contained in them, as the level of alchemy becomes higher and higher, the higher the herbs and trees aura contained in the herbs.

Even when refining some special elixirs, it is necessary to refine the special aura contained in the elixir, and strictly control the proportion of the aura of plants and trees and the special aura, as long as there is a slight deviation, the whole furnace of elixir will be scrapped instantly.

When Zhao Feiyu thought of this, he couldn't help but feel that the scientific instruments in the real world were more exquisite, and the errors could be controlled within a very small range.

And in this world of cultivating immortals, there are two completely different paths from the real world where Zhao Feiyu is located.

The monks in this world of cultivating immortals advocate cultivation and strength, and they all rely on their souls to control all kinds of delicate things.

And everyone's soul is a little strong or weak, which is why Zhao Feiyu will be competed by the peak masters of each mountain peak to be his disciple after the hanging cloud ladder lights up the thirtieth stone steps.

Moreover, in this world of cultivating immortals, at least Zhao Feiyu's current contact with it seems that there are no divine soul spells that can be suitable for the cultivation of ordinary monks, and the strength of soul power can only rely on innate talent, and those exercises can only exercise the strength of the divine soul.

And the Divine Soul Light Points that Zhao Feiyu saw in the stone house can indeed increase the soul power of the Divine Soul, but that kind of Divine Soul Light is obviously extremely precious, but Zhao Feiyu used the means to swallow all the Divine Soul Light Points, but because of this, Zhao Feiyu's Divine Soul was almost shattered and fell on the spot.

It can be said that ordinary monks can only devour a small amount of Divine Soul Light Points, and too many will only bring disaster to themselves in the future.

Therefore, in this world, the most fundamental thing is the innate talent of the divine soul, according to the language in the real world, it is God who appreciates food and is born to eat this bowl of rice.

According to Zhao Feiyu's observations, even if Senior Brother Zhang's control of soul power and divine consciousness is strong, it may not be as accurate as a calculator in the real world, not to mention many scientific measuring instruments used in scientific research.

Thinking of this, Zhao Feiyu couldn't help but straighten his chest, feeling extremely proud, it was the brilliance of human science and technology, and in this world of cultivating immortals, there was also a different light, it was an existence that was completely inaccessible in this world of cultivating immortals, and it was a completely different path.

And in the soul thought that Sander gave to Zhao Feiyu, he only said that only by continuous training and continuous refining can he gradually master the methods, and he relies entirely on the experience accumulated after continuous failure.

"I see." Zhao Feiyu couldn't help but grope his chin, although he couldn't make those extremely exquisite scientific instruments, but tools like that could still be made quickly.

"These formulas, when the time comes, just weigh them, and use experience to grasp them every time, and use more ways to catch them." Zhao Feiyu couldn't help but say.

But at this moment, he didn't have time to make tools, so he could only put a few of those herbs with similar medicinal properties into the yellow clay furnace according to the pharmacology given by Sander and start refining.

The smell of herbs wafted in this pavilion, and the pile of herbs beside Zhao Feiyu was also shrinking rapidly.

Zhao Feiyu looked towards the wooden box where the pills were stacked, there were already many pills of different colors in the wooden box, and even some of the pills were still escaping bursts of grass and wood aura on the surface, as if the pills could not restrain the surging aura contained in them.

But at this moment, Zhao Feiyu didn't have the heart to pay attention to these pills at all, he just wanted to refine all the herbs here into pills, and then take them away.

According to Sander's words, although those heaven-level herbs did not have any enchantment prohibitions, when those herbs came into contact with the breath of living beings, the aura of plants and trees in them would be contaminated with a trace, and if they were placed in place and perceived by other monks, there would be no possibility of escaping at all, and they would be instantly locked in shape, and then killed.

Therefore, Zhao Feiyu didn't dare to hesitate too much at all, and could only refine all the herbs here into pills and take them away, so as to ensure that his aura would not remain in those heaven-level herbs.

Before all the refining of that pile of heaven-level herbs was completed, the spiritual power flame released by the radish-like herb was instantly extinguished, and it was obvious that all the spiritual power contained in that herb had been burned out.

Zhao Feiyu kicked out the radish-like herb from under the yellow clay stove, and then carefully touched the dark herb.

The herb was like a hot potato sweet potato, and suddenly made a light sound, in which the burnt yellow flesh was instantly exposed, and the tip of Zhao Feiyu's nose instantly asked a strong fragrance, which was even several times more fragrant than the roasted sweet potatoes sold on the street.

"Good girl, it smells so good." Zhao Feiyu couldn't help touching his stomach, and gently touched the herb with his hand, then tore off a wisp of pulp, put it in his mouth and chewed it.

But before he could chew two bites, Zhao Feiyu spit on the ground.

"Phew!" Zhao Feiyu wiped his mouth, "What kind of thing is this, it's really unpalatable!" ”

Zhao Feiyu kicked the herb in the corner, and then returned to the yellow clay stove, continuing to select the herbs, but there was no longer enough spiritual energy contained in many herbs like the pickled radish.

Zhao Feiyu scratched his head, and his eyes suddenly focused on the pills in the wooden box.

After those pills were refined, they were already the purest herbs and trees aura, and they hardly contained any impurities.

"Isn't this the purest ingredient?" Zhao Feiyu looked overjoyed, and casually selected a few pills, regardless of the rarity of those pills, he ignited the aura in them, and the pills instantly turned into fireballs, releasing a scorching breath.

Zhao Feiyu hurriedly put those burning pills under the yellow clay furnace and continued to put the remaining herbs into it to refine.

Suddenly, the air was filled with all kinds of different fragrances of plants and trees again, which made people feel refreshed and happy, and there was a sense of fluttering immortals. Zhao Feiyu even felt like he was going to be intoxicated.

Zhao Feiyu's methods had a sense of exhaustion, and the pills that had been refined had once again turned into burning materials and became the raw materials for refining pills.

If Zhao Feiyu's method was known to the alchemy cultivators in the outside world, he would inevitably faint with anger.

You must know that every Heaven-level herb is extremely rare, and the pills refined by the Heaven-level herbs are even rarer, and even in Zhao Feiyu's family, there is a leaf of a Heaven-level herb that can be regarded as one of the deepest connotations in the family, not to mention that this complete pile of Heaven-level herbs is simply the existence that countless alchemists dream of.

But at this moment, Zhao Feiyu used the pill refined from the heaven-level herbs as the raw material for combustion, this kind of behavior was extremely extravagant and ruined, but although Zhao Feiyu felt a little pity in his heart, his face was still calm, it was obvious that these heaven-level herbs were not so precious in Zhao Feiyu's opinion, at least not as precious as he thought in his mind.

After all, all of this does not belong to Zhao Feiyu, it is all an existence obtained out of thin air, so naturally he will not be so distressed.

"Don't do it, this kind of breaking the world. I don't even want to cultivate immortals, and there are countless monks who rely on the strength of cultivation and want to manipulate me at will, I will definitely not act in this world of cultivating immortals according to the rules of the real world. Since they are like this, then I have to follow the rules of nature. Zhao Feiyu had already made up his mind in his heart, and he no longer had any moral intentions for the existence in this world of cultivating immortals, and only the weak and the strong could truly adapt to this world.

I don't know how long it took, as the last Heavenly Rank herb was refined into an elixir, Zhao Feiyu finally exhaled deeply, he hurriedly put all the pills in the wooden box in the yellow clay furnace, and then withdrew the yellow clay furnace into the sea of souls.

After doing all this, Zhao Feiyu arrived for a moment of relief, but a feeling of exhaustion also surged like a tide.

Zhao Feiyu lay heavily on the ground and gasped for breath.

Although the alchemy method given by Gu Xuan did not need to control the burning strength of the spiritual flame too much, it still needed to consume a large amount of divine soul power, and at this moment, Zhao Feiyu's divine soul was already in an extremely weak state, and even his face became pale.

But Zhao Feiyu's face was still filled with a smile, and he observed the yellow clay furnace in the sea of souls.

There were many pills in the yellow clay furnace, all of which revealed the purest colors, and from a distance, they could only be seen in a colorful field.

In the Soul Sea, the aura contained in those pills will not escape, and it can be said that in a sense, the Soul Sea is an excellent place for those pills to be preserved.

Zhao Feiyu looked at the emerald green flame in front of him, and a wave of warmth came to his face.

The elixir that had not yet burned out was slowly burning like a bonfire at this moment, revealing a peaceful and strange aura in this pavilion.

Looking at the faint green flame, Zhao Feiyu still hurriedly got up, and he closed the open wooden boxes one by one, as if nothing had happened.

But the heavy dust on those wooden boxes had already imprinted Zhao Feiyu's forehead palm prints.

Zhao Feiyu suddenly found that there were several boxes in the corner, and he hadn't noticed it before.

Zhao Feiyu opened the wooden boxes, and saw that what was placed in them was a venerable medicine tripod, all of which revealed a simple and mysterious atmosphere.

Obviously, these medicine tripods look quite extraordinary, and they don't know how high they are compared to the jade tripod in Zhao Feiyu's hand.

But Zhao Feiyu didn't dare to take it away at this moment, so he closed the wooden box and put it in its place.

"Old man Sang, you just said that my breath will remain here, so what should I do?" Zhao Feiyu asked.

"It's not easy." I saw a thunderbolt flashing out from Zhao Feiyu's eyebrows, carrying a terrifying aura of destruction, enveloping Zhao Feiyu's body and disappearing.

And the thunder that stayed in place instantly turned into countless thunderbolts flashing, Zhao Feiyu's breath was completely cleared, and no one could find Zhao Feiyu's breath anymore.