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Zhen Yinjian finished the communication with Shopkeeper Feng and returned to the cave where he rented it. Although Shopkeeper Feng was very enthusiastic about providing him with some caves with better conditions, he was still rejected by Zhen Yinjian.

In terms of confidentiality, Zhen Yinjian still chose to rent the cave mansion by himself, which was quite convenient.

Entering the cave mansion, Zhen Yinjian immediately entered a state of pranayama, and Zhen Yinjian's tasks in the next two days were relatively heavy. First of all, he needed to carefully ponder the refining of the marching pill, and then refine as many pills as possible in two days.

The so-called marching pill is a method of refining elixir used by a generation of immortal emperors to lead thousands of monks in the Middle Ages. The so-called marching pill naturally does not refer to a certain kind of pill, but a refining method that mixes various grades of pills.

Because of the huge gap in the cultivation of the monks in the Immortal Emperor Army, it was difficult to meet the needs of refining a single grade of elixir, so there was a method of refining a marching pill mixed with multi-rank pills.

To put it simply, the marching pill is a furnace refining method to ensure the basic quality of the pill. For example, if you learn the refining method of the marching pill, you can refine the first-order, second-order, third-order, and fifth-order mid-grade pills at the same time. Moreover, there are many of these pills, but the grade can be stabilized to a certain level.

For example, Zhen Yinjian's current pursuit is to refine the second-order, third-order, fourth-order, and fifth-order middle-grade pills at the same time, and the method of marching pills is cultivated to the extreme, and it is rumored that the first-order to eighth-order earth-grade pills can be refined at the same time, which is a legend that existed in the Middle Ages.

Zhen Yinjian is refining pills for the black market auction house, and maintaining a stable grade is the most important thing, now if he can learn the refining of the marching pill and refine a large number of pills at the same time, he will naturally be able to solve the current dilemma of the black market auction!

The biggest advantage of the marching pill is that it produces a large amount of pill and the grade is stable. As long as there are enough spiritual materials, the refining speed is very fast!

After all, the time left for Bi Jinse to agree with him was running out, although Zhen Yinjian refused Bi Jinse's help at the beginning, but after thinking about it, in order not to be separated from Bi Jinse, he thought about it again and again and felt that he would return with her.

After all, when you arrive at Donghua Palace, if you lose contact with Bi Jinse again, I'm afraid it will not be easy to find the other party again.

At that time, he will not have the opportunity to use magic weapons such as "Heaven and Earth Bu"!

Zhen Yinjian planned to spend two days mastering the refining of the Marching Pill, and then complete the final sniping of the Zungong Auction House, and leave the Northern Desolate Land.

Now that his strength has reached a level that is extremely close to the Casting God Realm, I believe that defeating the Donghua Imperial Sect Master will also have a great chance of avenging the master's revenge.

Based on his perception of his current realm, the strength of the original Donghua Imperial Sect Master had indeed reached the ninth level of Dao Artistic Conception, but the power of the law was still at a low level, and it was still a little worse than Zhen Yinjian's current level.

With such an advantage, Zhen Yinjian has a good chance to defeat this person. Because he returned to Donghua Yu at this time, Zhen Yinjian had nothing to worry about!

Now that he had a plan, Zhen Yinjian continued to implement it. Zhen Yinjian only knew about the refining method of this marching pill when he received the inheritance of the God King Realm Medicine Palace earlier, and he had never had the opportunity to learn and use this method.

Now with the help of the black market auction house, presumably the refining method of the marching pill can also be mastered by itself!

With his eyes slightly closed, Zhen Yinjian immediately sensed a lot of knowledge in the inheritance he had received, and quickly found the refining method of the "Marching Pill".

Because it is very difficult to refine many levels of elixir in one furnace. Zhen Yinjian was not too eager, but first carefully read the refining skills of this kind of Dan method, and figured it out very clearly before starting to act. At this time, Zhen Yinjian quickly sank his consciousness into the system space and began to try to learn.

Within two days, it is obviously unrealistic to master this kind of difficult marching pill refining method, and at this time, it is necessary to use the power of the system.

The space of the "Dan Array Exercise" was opened again, and although Zhen Yinjian's remaining conquest points were only 800 points, he still did not skimp and quickly devoted himself to the practice.

Once, twice...... 100 times, 200 times......

Zhen Yinjian has been continuing to try to refine the marching pill, and unlike what he expected, the refining of the marching pill is very difficult, and it is not even lower than the refining of the fifth-order pill at all.

How to master the control of Danhuo between different pills, and how to control the use of Dan techniques in different pills, all of these reflect the difficulty of this kind of pill method, and also make Zhen Yinjian feel sincere admiration for the Immortal Emperor who created this kind of pill method.

What kind of character was able to create such an ingenious method, it was really shocking to Zhen Yinjian!

It's just a pity that what happened in the Middle Ages, which seems to have passed through that era of disillusionment, is now little known, and there is almost no record of its existence. Perhaps the most powerful Immortal Dao families or the top powers have collected some records of the Middle Ages.

Sighing and sighing, Zhen Yinjian finally spent three years and six hundred conquest points to finally fully master the refining method of the marching pill, and then Zhen Yinjian breathed a sigh of relief.

If he can't master it, Zhen Yinjian may have lost all his efforts. You must know that he only has two hundred conquests left. During this period of time, Zhen Yinjian did not receive the task of systematic conquest, and the conquest points have been constantly consumed, and the number is getting smaller and smaller, which cannot support Zhen Yinjian to do much.

After mastering the refining method of the marching pill, Zhen Yinjian came to the black market auction house to negotiate with Shopkeeper Feng to finally call a large amount of alchemy materials. At the same time, in the refining of one day and two nights, he completed his original goal.

Then he instructed the people from the black market auction house to bring these pills back to the auction house and continue the next plan.

Liu Deli, who was ordered to come, was really stunned when he saw the boxes of pills carried out from Zhen Yinjian's cave mansion!

"There are actually as many as ten boxes of second-order pills, there must be thousands of them!"

"The number of third-order pills also has three boxes, there are always three hundred pills!"

"Oh my God, there is actually a box of fourth-order pills, which is more than the number of auctions in half a month at the Zungong Auction House!"

When Liu Deli saw the ten spirit jade bottles being carefully taken out by the guys, he suddenly felt a feeling of colic in his heart, and he gasped as if he couldn't keep up with his breath.

That spirit jade bottle was specially prepared for the fifth-order pills, and one bottle could only contain one pill, wouldn't these ten bottles mean that there were ten fifth-order pills?

In just over a day, Zhen Yinjian had refined ten fifth-order pills, and at such a speed, Liu Deli felt that his eyes were dazzled!