Yun Tian knew that refining the pill looked very simple, but it was actually very difficult, and only a strong person with mana could refine it, because only mana could resonate with the pill.

For example, the furnace pill that Liu Yun is refining now is called "Bigu Dan", which has the effects of increasing bone strength, condensing the flesh, and dredging the meridians, and is one of the pills that must be used by masters of the True Qi Realm.

Moreover, Bigu Dan is a spirit-level elixir, and only a master at the Yuanying Realm level can refine it if he has an excellent Dan furnace, and a Jindan master cannot refine it, but a Jindan master can refine all human-level pills.

The masters of the Heavenly and Human Realm can refine earth-level pills, and if there are medicinal materials, they can even refine heaven-level pills, but it takes a hundred years, and generally only the strong above the immortal realm will refine them. But there is one thing that is inseparable from them, and that is the Dan furnace.

Among the magic weapons, flying swords and magic clothes are respected, but the Dan furnace is the most valuable and the most rare. The Dan furnaces of most of the true disciples of the Zhenyuan Sect are low-grade treasures, and there are very few superb treasures like Shanhe Ding.

Pills are generally divided into five levels, human, spiritual, earth, heaven, and immortal. Each level of elixir is divided into four grades, lower grade, middle grade, upper grade, and superb!

The pills that are generally consumed are human-grade pills, because these pills are often eaten to nourish the body. And the Bigu Dan has the effect of dredging the meridians, and it is very difficult to refine by a realm higher than the Human Pill, which is the spirit-level pill. Prefecture-level elixirs are of very high quality and are generally difficult to find.

Heaven-level pills, such as the Ten Turns Jiazi Pill, break through the realm, increase longevity, temper the flesh, enhance mana, and have many levels of action, which is very difficult to refine. However, most of the heaven-level pills are useful for the first one, and the second one is not very useful.

The elixir is rarer than the Taoist weapon........

"Mother, I have a lot of medicinal herbs here, you can see what pills can be refined. With a thought, Yun Tian took out all the medicinal materials he had obtained, some of which he had collected underground, and some of which he had stolen from the sky, Bai Zhen........ , no less than 10,000 kinds, and some of them are of very high quality.

For example, the red blood grass collected in the underground before can refine the spirit-level elixir "Red Blood Pill", and the Tianyu Cold Ice Core can refine the ground-level elixir "Qi Gathering Pill", which can gather vitality and increase the power of True Qi Gang Qi, which is the elixir that masters of the True Qi Realm and Gang Qi Realm dream of. If the master of the Jindan Realm takes it, the effect will be weakened.

"Well, there are indeed some good things in this, I will refine this red blood grass into a red blood pill and let Xin'er take it, as for such a large Tianyu cold ice core, it can refine five or six Qi Gathering Pills, and when the two of you step into the True Qi Realm, you can take it, and then you will absorb more Heaven and Earth Yuan Qi, and the quality will increase a lot. Liu Yun saw more than ten kinds of precious medicinal materials at a glance, and he also had a corresponding plan.

"Okay!" Yun Tian nodded.

The Qi Gathering Pill is generally an elixir that can only be taken by masters of the True Qi Realm or the Gang Qi Realm, but if a person takes it at the moment of breaking through the True Qi Realm, the body will quickly gather Qi, and as long as the spirit is strong enough, he will be able to absorb more different Heaven and Earth Yuan Qi and refine it into stronger True Qi.

For example, a person could only absorb fifteen kinds of Heaven and Earth Yuan Qi, but at the moment of breaking through the True Qi Realm, after taking one Qi Gathering Pill, he would gather a large amount of Qi, and he could absorb twenty, or even thirty kinds of Heaven and Earth Yuan Qi.

And a master of the True Qi Realm or Gang Qi Realm will be able to absorb some Heaven and Earth Yuan Qi again, although there are still so many types and it will not increase, but the True Gang Qi will be much purer, so that the power of the True Qi or Gang Qi can be increased.

After Liu Yun finished speaking, he began to refine these two kinds of pills, this time he was very careful in refining, after all, there were too few materials, and he must not fail, but with Liu Yun's alchemy methods, he would not necessarily fail.

This time, Yun Tian and the others were silent, without saying a word, Yun Tian was also cultivating his spirit while looking at the various techniques of alchemy, so that he could step into the True Qi Realm earlier.

For so many days, the King of Darkness has only been doing one thing, which is to study the mysterious fragment, although there has been no progress for a long time, but the essence of the mysterious fragment has converged a lot, and from time to time it also emits different colors of light, which seems even more mysterious.

Although Liu Yun is alchemy, he is also pointing to the cultivation of Yuntian's spirit, and Yuntian has gradually understood the transformation and cultivation of qi and blood, spirit, mana, etc., clearly, clearly, and understandably.

Liu Yun's explanation benefited him a lot.

Although there are people in the Zhenyuan Sect who specialize in explaining various cultivation methods to the inner disciples, Liu Yun's experience is also very rich, no less than these explanations of the Great Elders, and Yun Tian is now very good at understanding, Liu Yun can understand the meaning of it with a casual pointer.

"Sure enough, it's been three years of hard study, it's not as good as a famous teacher! Although it's only been three days, it has benefited me a lot, and now I have a deeper understanding of spiritual cultivation, and my spirit seems to have been raised to a higher level again, and my physical body has also condensed a lot, so I guess I will be able to break through to the true qi realm soon!"

Three days later, as soon as Liu Yun patted the Dan furnace, six transparent pills the size of a dragon's eye appeared in his hand, just three pills for Yun Tian and Yun Xin, just waiting for them to break through the True Qi Realm.

This Qi Gathering Pill is a transparent color, and there are many small whirlpools on the surface, as if it is swallowing the vitality of heaven and earth, which seems to be very mysterious, but the strange thing is that there is no trace of vitality leaking.

After putting away the pill, Yun Tian patted his buttocks and slowly stood up, and immediately felt refreshed, and there seemed to be a hot air rolling in his body.

Yun Tian knew that this was the earth fire essence that had entered the body, and he was refining the body, so he was not surprised, and let these flames quench his body, because the earth fire was the earth essence and could be used to refine the body.

In the past, there was an inner disciple of Zhenyuanmen, who had average qualifications, but he was not willing to fail and was looked down upon by others, so he hid in his room every day, refining his body with the help of a trace of not very pure earth fire.

Day after day, year after year, decades later, this disciple suddenly broke through the Jindan realm and became a true disciple, and although he became famous, he still insisted on refining his body with flames. Hundreds of years later, not only did he break through to the Yuanying Realm, but he also cultivated the "Shenyuan Fire Body", which was very easy to blend with the flames, and now he has become a great elder, called "Yan Yanglie". is also a character who says the same, and has a little friendship with Yunyangzi.

Yun Tian was also going to use the earth fire to temper his body, but now he obviously didn't have time, because the Inner Immortal Conference was about to start tomorrow.

"Big brother, the Inner Immortal Conference will start one day, you better prepare first, I always feel that this Inner Immortal Conference will not be peaceful. Yun Rou also stood up and said.

"Well, I feel this way too, but it's okay, one more day is enough for me to prepare!" Yun Tian is not worried, mainly because there is no need to worry, if there is danger, just deal with it with all your might.

Back in the room, Yun Tian didn't waste a trace of time, he entered the cultivation state of Dading Kongming and began the final preparations for the Inner Immortal Conference.

Knock knock knock!

Suddenly, there was a drum sound, which startled Yun Tian in cultivation, Yun Tian slowly opened his eyes, and put his eyes outside, "The Inner Immortal Conference has finally begun...........