What Li Mochen wants to refine is the 'Waidan' in Taoism.

As the name suggests, 'Waidan' is the golden pill outside the human body. A long time ago, the monks of the Primordial Dome Realm often refined some heaven and earth strange things, as well as demon pills and the like, into outer pills, either for quick formation, or as a supplement to their own golden pill primordial gods.

Since at that time, the spiritual power of the Primordial Dome Realm was still extremely vigorous, so this 'Waidan' was also very popular in the entire cultivation world, and no one did not practice it, and no one did not practice it.

Legend has it that there are also people who use top-level demon pills, or various essences of heaven and earth, to refine into the second elemental god and cast boundless mana.

However, this method, only cultivating life and not cultivating nature, is not the right path after all. Few of those people who are high in Waidan can live a good life.

When the spiritual tide between heaven and earth is exhausted, not only those heavenly and earthly treasures are gradually rare, but also demon beasts and the like, and there are not many left in the world, so this method of outer pills will gradually decline and become a minor technique of the Daomen.

Li Mochen was in the realm of the original firmament, and he originally did not cultivate the Outer Dan. But when he attained Mahayana at the age of more than sixty years old, and then was limited by the lack of the entire heaven and earth, and it was difficult to advance in cultivation, he began to study the method of Waidan, and improved it on the basis of the secret transmission of the sect, trying to achieve his second elemental god.

It's a pity that he still couldn't succeed in the end, and the resources of the Primordial Dome Realm at that time were too few. After he raised the Wai Dan to the realm of the Primordial Firmament, which was second only to the Mahayana realm, it was difficult for him to enter an inch.

However, when it comes to the study of Waidan, if he Li Mochen says that he is the second, it is estimated that no one dares to say that he is the first.

Inside the cauldron furnace, the beast crystals of the wildfire mammoth had begun to melt. Li Mochen immediately manipulated the magic array in the crucible furnace, emitting a cloud of yellow and red spiritual light, forcibly confined in the furnace.

The so-called beast crystal is actually the flesh and blood of beasts, fused with high-purity magic energy. And once it melts, the high-purity magic energy inside will all dissipate.

At this time, what Li Mochen had to do was to replace the flesh and blood of the wildfire mammoth with other materials, and become the body of high-purity demonic energy.

At the same time, he also needed to further purify these high-purity magic energies, and burn a huge and complex runic array inside this body, so that it could obtain abilities similar to that of the monk's golden pill.

And the reason why the beast crystal of the wildfire mammoth is more suitable than other beast crystals. One is because it far exceeds the huge reserves of magic energy more than ten times that of other beasts, and the other is because of the large amount of earth-based spiritual power that exists in the beast crystals—of course, it can also be called magic energy.

In the eyes of Taoist immortal cultivators, the land of the five elements has a unique position in the five elements, which is the source of all qi and blood biochemistry, and also the foundation of all living beings, so it is the "foundation of the day after tomorrow".

This is the basis for the existence of Waidan, only by first cultivating the spiritual power of the earth system, can other spiritual power be attached to it.

In addition, the beast crystal of the wildfire mammoth has an additional benefit, it also has some wood-based high-purity spiritual power. Although it is not possible to achieve the coexistence of the five elements, but between the three systems of fire, earth and wood, in fact, it can also achieve a small cycle of shengke, which is an excellent material for making Waidan.

At this time, Li Mochen was actually very unskilled in the manipulation of the magic array and the crucible furnace, and even relatively jerky.

But now that he has the right materials, Li Mochen never wants to miss it.

The original owner's body is in danger, and he can't help but recover some of his strength as quickly as possible, and this 'Waidan' technique is the most feasible method.

This time, if you can successfully refine the 'Outer Dan' of the extra-law level, it will naturally be the best. As long as he collects the best magic energy guns and magic weapons, then in the future, unless he encounters a high-level magic energy professional above level fifteen, it will be difficult to hit him physically and forcefully.

But even if he fails, he can gain enough experience to make the next attempt.

Then Li Mochen was engrossed, and gradually he didn't know the passage of time. He used the tools at his hand to stir, forge, and carve in the crucible furnace repeatedly, and he was completely oblivious to the sunset and sunrise outside.

It wasn't until inside the cauldron furnace that he began to draw magic energy from all around like a whirlpool, that Li Mochen's expression was slightly relaxed, and he wiped the beads of sweat on his face with his hands with joy.

Although the process was very reluctant and thrilling, and he almost burst the furnace by just a millimeter, he still refined this thing after all!

It took about ten breaths for the surging magical energy to subside. At this moment, Li Mochen also dripped his own blood through the special space of this crucible furnace. So in the next moment, there was an even greater tide of magical energy, and inside this cauldron furnace seemed to be a bottomless abyss, devouring and sucking the accumulated magical energy.

This time it lasted for about half a minute, and when Li Mochen opened the furnace door, he saw a golden pill lying inside. This pill is about the size of a pigeon's egg, and if you look closely at the surface, you can also see some faint mysterious spirit patterns. It's not fixed, it's just a change as the light moves.

With Li Mochen's thoughts, this Wai Dan, which he had named 'Spiritual Fire', spontaneously flew up and fell into his hands.

In the next moment, a solid stone shield was formed in front of him, followed by flames, a red flame, pulsating and burning in the palm of his hand.

These are all immortal techniques in the realm of the primordial firmament, and they are all performed with the help of the power of this outer pill.

However, this is not a spell practice room, Li Mochen did not dare to cast a more powerful spell, he tried it a little, and then withdrew his hand and put this outer pill into his sleeve.

At this time, Li Mochen's eyes were also slightly disappointed and helpless.

This is a Wai Dan of the Fusion Realm, and with his current level, he can only go so far-

The so-called fusion realm, that is, the qi cultivation realm of this world, is changed to the Western magic energy profession, which is the appearance of nine to ten levels.

And the reason why the eleventh-level beast crystal was finally downgraded to this point was because there was already a loss in the process of purification, and secondly, because of his previous mistakes, which caused some of the high-purity spiritual power to dissipate. So after the final formation, it is only between level nine and ten.

It is a pity that this Waidan has not reached the point of being comparable to an outsider. But in his current situation, it is fortunate that he can refine it

In addition, it is probably due to the impurity of the magic energy of the beast crystal itself.

Unlike human magic professionals who can enter the Legend Realm at level 21, these magical creatures often need to be level 26 or above to enter the Legend Realm. This is the difference between unconscious accumulation and conscious cultivation.

Li Mochen judged that if he wanted to refine a Wai Dan that truly reached the strength of the extra-law level, on the one hand, he needed to continue to improve his ability in refining, and on the other hand, he also needed to obtain a beast crystal of at least thirteen or above, or other heavenly and earthly treasures.

This is because there is a chasm between the tenth and eleventh levels of demonic energy, and it is not as simple as a gap of levels.

And when Li Mochen walked out of the refining room, he found that it was noon. In other words, the four classes on Monday morning were unconsciously missed by him.

Li Mochen couldn't help but rub his eyebrows with a headache, knowing that he would go to school later, he was afraid that he would inevitably be nagged and even reprimanded by the grade counselor.

But it doesn't matter if that's it, the key is the class time. If there is not enough class time, it will still have a great impact on his GPA score. Absenteeism without excuse will affect the teacher's perception and rating.

But in this situation, it is useless to regret it, and he will not regret it. If he made another choice, Li Mochen would still do it, just a few lessons, and it would not be more important than his life.

Luckily, Tuesday was the time for the midterm exams, and he didn't miss it.