Qingxu Dao Chang is also an expert in refining pills, so he wants to take the opportunity of refining Guji Dan this time to let Feng Shaoyang participate in learning the method of refining this pill.

The refining of a pill often requires several kinds of materials, and the high-grade pill materials have reached more than a dozen, among the refining materials of these alchemy, only one or two or three materials are the most precious and critical, called the main materials, and the rest are auxiliary materials.

The so-called main ingredient is that the essence and aura contained in these materials are too strong and intense, or it is extremely difficult to be directly absorbed and utilized by the cultivator, and it is often necessary to use some auxiliary materials to extract, condense, or slow down and delay, so as to achieve the purpose of making it easy for the cultivator to absorb without harming the body.

Of course, some main ingredients often have very high toxicity, and some excipients are also needed to dissolve or maximize the reduction of these poisons.

And some of the auxiliary materials sometimes contain harmful ingredients that are not conducive to the cultivators, and they should also be removed one by one when refining the pill.

In addition to the various materials, recipes and methods of alchemy, the choice of alchemy furnace tripod is also crucial.

The furnace used in alchemy will also have different shapes and structures due to the different refining materials. The temperature of the scorching tripod is relatively high, and it is usually used to smelt mineral materials such as spars, the steamed tripod is used to extract and analyze herbs and trees, and the yun tripod is used to purify the essence of alchemy auxiliary materials and extract and smelt together with the main ingredients.

The treatment of various materials in alchemy, the selection of furnace tripods, the temperature of quenching, the mutual restraint between various materials, the timing of mixing, and the time of firing all need to be cautious.

Generally, the refining of simple pills takes several hours, some take two or three days, while the refining of high-grade pills takes at least ten days, or even longer, which also requires the alchemist to have great perseverance and patience. Therefore, alchemy has become an extremely complicated and cumbersome matter.

Therefore, each sect will have a special Danzhi Hall to be responsible for the refining of pills, and the status of alchemists in the hall is also very high. More importantly, the cultivation and comprehension of alchemists also determine the success rate and level of elixir refining.

Alchemy needs to be learned from a young age, after joining the monastic sect to become a qualified inner disciple, in addition to daily cultivation, the most important thing is to learn to distinguish the attributes, pharmacology, and spiritual energy richness of various plants, trees, and stones, and at this time is also known as the medicine child.

After becoming proficient in pharmacology and material identification, the medicine boy is qualified to assist the alchemy elders in some simple and elementary work.

It was not until the cultivation of the medicine boy successfully advanced to the foundation building period that he would be taught by the alchemy elder to learn the refining of the elixir and grow into an alchemist, and then with the increase of years of experience and the advancement of cultivation, he was gradually promoted to an alchemist, an alchemy elder, and finally an elder of Jindan.

In addition to this alchemy being a very time-consuming and energy-consuming matter, the inheritance of experience requires an experienced master to teach it in person, while the understanding needs to be summarized and comprehended by oneself in failure after failure.

Fortunately, Feng Shaoyang was smart and studious, and he was personally taught by the Qingxu Daoist, who opened up a quiet room in the forbidden place in the backyard, prepared all kinds of materials used in alchemy, and began to refine Guji Dan after the alchemy furnace.

Feng Shaoyang was extremely reluctant to learn to refine the pill at first, but after the Qingxu Dao Elder asked the reason, he explained in detail the process of Qingyun's exchange of alchemy materials. After hearing that he didn't exchange it with the wolf demon Neidan, he curiously picked up the precious spirit snake dragon robe and took a closer look, a large piece of precious material with a dark color and a slight purple gas.

Since this refining is a new formula of Guji Dan, there are three flavors of the main ingredient and ten kinds of auxiliary materials, and this spirit snake dragon coat is one of the main ingredients.

The refining of Guji Dan is divided into three stages, first of all, it takes two days to condense and extract the useful essence elements of the ten kinds of auxiliary materials with the scorching ding and the steaming ding respectively, and then use the Yun Ding to slowly refine the three flavor main ingredients, and then add the essence extracted by the ten auxiliary materials one by one, which takes about two days before and after.

Finally, the mixing begins, which takes about three days.

Since it was the first time to operate the refining pill by himself, Feng Shaoyang was extremely attentive, and under the careful guidance of the Qingxu Dao Master, he also learned very quickly. More importantly, alchemy requires patience and perseverance, and refining for several days, more than ten days, is no less than retreat cultivation for Feng Shaoyang.

The fire required to refine this flavor Guji Dan is an ordinary furnace fire, but it needs to be triggered by the true qi of an alchemist, which requires a certain amount of cultivation, which is also the reason why it is impossible for an alchemist to refine the pill for many years.

Because Feng Shaoyang has no true qi, he is sent by the Qingxu Dao Leader to stimulate the fire, which is triggered every other hour, and then handed over to Feng Shaoyang to take care of, and he also temporarily plays the role of a medicine boy.

Since the weight of the Spirit Snake Dragon Clothes can refine three Guji Dan, in order to be cautious, the Qingxu Daoist also divided all the materials into three parts, and only one was refined this time, if it failed, there were still two copies of materials to spare, so as to keep it safe.

The first two stages of the elixir refining went smoothly, and on the fifth day, the third stage of refining began.

Mixing is different from the previous two stages, you need to observe the state of the elixir smelting from time to time, at this time, the essence of various materials are mixed together, and if you are not careful, you will not be able to condense into a pill, and even burn into a ball of ashes.

Therefore, the head of Qingxu Dao stayed by the furnace day and night, carefully observing the color of the furnace fire, the form of the melting of materials, and explained to Feng Shaoyang from time to time.

On the sixth day, it was also relatively smooth, everything was progressing in the direction of success, Feng Shaoyang was also a little happy, after all, the pill he personally participated in refining was about to be completed, but the Qingxu Daoist did not dare to slack off, and he couldn't put his mind at ease until the last moment when the pill was baked.

On the last day, which is also an extremely critical time, the color of the materials melted in the furnace is getting more and more positive, and a faint aroma can be faintly smelled in the room. Feng Shaoyang's expression has been in a state of excitement for a few days, although he is very tired, but seeing that the pill is about to be completed, he is full of energy.

Qingxu Dao Chang has consumed a lot of True Qi in the past few days, although he is nervous, his face is also a little soothed at this moment, and he waits silently.

When it was time to go to Shen, when there was only half an hour left before the Dan, there was a change in the furnace ding, and the material in the melting state did not condense, but a small black dot appeared in the center. This change made the Qingxu Dao Elder puzzled, this phenomenon was not recorded in this Danfang refining method, what could be the reason?

Qingxu Daoist quickly thought about it, trying to find the answer from his previous experience, but before he could come up with the result, the small black dot suddenly became larger and larger, gradually occupying half of the area.

Qingxu Dao Chang secretly screamed that it was not good, at this moment the furnace is in the process of cooling and cooling, and the material to be melted can be liquefied to produce Dan, and this sudden black spot indicates that the temperature in the furnace does not fall but rises.

Seeing that the Dan materials in the furnace were about to be burned, the bloodshot eyes of Qingxu Dao were full of regret and worry, and at this time, a fire flashed in the furnace Ding, emitting a strong scorching smell, and then, a furnace of Dan materials all turned into black ashes.

Although there are still two copies of Dancai, but one less means one less opportunity, Qingxu Dao Chang was anxious for a while, he worked hard and tired for several days, and his cultivation was damaged, and the blood in his body took the opportunity to attack, only to feel a huge pain in his heart, and suddenly he didn't support it, and a mouthful of blood gushed out.

Seeing such a change, Feng Shaoyang rushed forward, hugged Qingxu Dao Chang, and saw that he was already a golden paper, and fainted.

He shouted in regret: "Dao Chief...... Just as he didn't know how to treat it, suddenly, a person flew in from outside the alchemy room, raised his hand and exerted a breath of clear qi, covering the body of the Qingxu Dao Chief.