In the intermediate-level alchemy room of the Chixiao Peak's Earth Fire Vein, Lei Luo sat cross-legged in the quiet room, breathing evenly with his eyes closed and pranayama, and the aura around his body was absorbed and devoured by him, which was used to quickly recover the energy consumed.

It took a total of three days and three nights to refine the revised version of the Sword Heart Pill, and he didn't sleep endlessly, which made his spirit and spirit all in an overdraft stage.

After sleeping in this secret room for a day and a night, he was able to regain his strength, and then he immediately recovered.

After confirming that all his spirit and spirit had recovered, Lei Luo put the original Sword Heart Dan Dan Fang in his mind and began to simulate it.

Different from the revised version, the original version of the Sword Heart Pill is just to neutralize the intense medicinal properties of the sword heart grass, and the auxiliary medicinal materials are twice as many as the gladiolus flowers, and the medicinal properties of the two main herbs cannot be compared.

If the medicinal properties of the gladiolus flower are a dagger, the sword heart grass is like a swordsman's peerless sword, which is why he will prepare a hundred medicinal herbs.

Holding a small green grass that looked like a small sword in his hand, Lei Luo could clearly feel that a sharp sword aura was dissipating from his hand to the surroundings.

This is the main medicinal material of the Sword Heart Pill, the Sword Heart Grass, if it weren't for Lei Luo's cultivation of the secret art of refining the body, he wouldn't be able to hold the Sword Heart Grass in his hands alone, and the palm of the ordinary person might be cut by the sword qi of the Sword Heart Grass!

"It's such a domineering medicinal nature, this sword qi is almost catching up with the attack of the qi cultivator!" Lei Luo said in surprise as he felt the impact of the sword qi on his palm.

Without further ado, let's get started!

Because it has been simulated many times in the brain, the classification of medicinal materials is very fast and very efficient.

The 100 portions of medicinal materials were quickly divided, and this time when distributing the medicinal materials, there was no room for error in every step, and when all the medicinal materials were in place, the heating furnace began.

Looking at the Dan furnace that was already emitting high temperature, Lei Luo took a deep breath, and then encouraged himself in his heart, and began the refining of the first pill.

As a result of simulating it in my mind several times, there was no mistake in the placement of this first medicinal herb, and there was no problem until the Kenshin Grass was placed in it.

However, when the sword heart grass was put into the Dan furnace, the medicinal materials in the entire Dan furnace began to react violently, and then all the medicinal materials shook violently, and finally they began to scorch under no choice.

Seeing that the last thing that came out of the alchemy furnace was a furnace of black viscous paste, Lei Luo was slightly speechless, it was obvious that this refining had failed.

Since all the steps were correct, he continued to refine again.

The second, third...... Until the eighth part, he failed.

Since every time he refined, there was a problem when he placed the main herb Kenshin Grass at the end, Lei Luo stopped, and then began to think about what went wrong, but after thinking about it for a day, he had no clue.

After confirming that there was no problem with each step of his placement, he could only choose to continue observing the next day, because there was really no clue, and this elixir still had to be refined.

The next day, the ninth, the tenth...... The fifteenth part, still like this, had to make Lei Luo pause the alchemy, and then continue to meditate hard, what went wrong.

"By the way, let's take a look at whether there is a record in the "Chen Yunzi Dan Sutra"!" Lei Luo had no choice but to have the idea of giving it a try, and flipped through the contents of this Dan Sutra from his mind.

"Chen Yunzi Dan Sutra" records a lot of high-grade pill recipes and refining methods, and there is a description of the Sword Heart Pill, but the refining steps are the same as Lei Luo's.

This Dan Sutra does not have much experience in alchemy written in it, just like the private school in the academy Mr. will only let you memorize by rote, and will not teach you any methods, giving you a feeling that you can refine it step by step.

However, there will still be some advanced annotations on the techniques of alchemy, and there will be a small section of experience behind the Danfang, although these are short, but they are really useful.

Lei Luo knew that he was unlikely to succeed in refining next, so he continued to look at this pill scripture with the mentality of taking a look, and when he saw the summary of the pill at the back, a passage caught his attention.

"Because of the accumulation of years, the medicinal properties of the 10,000-year elixir are several times more intense than that of ordinary elixirs, and the spiritual power contained in them is the same, and it is necessary to increase the auxiliary medicinal materials more than twice to neutralize the medicinal properties that can be used to alleviate its enhanced medicinal properties!"

Looking at this passage, Lei Luo was stunned for a moment, and then knew that his problem was there.

Kenshin doesn't need 10,000-year-old sword-hearted grass to refine, so there's nothing wrong with Danfang, but the 10,000-year-old sword-hearted grass that I collected on Yaoxin Island has enhanced its medicinal properties several times, and with the auxiliary medicinal materials of ordinary amounts, it can't be neutralized naturally, so I will always fail.

Next, since Lei Luo knew the problem, he naturally found a way to solve it, and took out a copy of the medicinal materials of the Sword Heart Pill, and then took out the auxiliary medicinal materials in the second medicinal materials to experiment with the amount of this neutralizing auxiliary medicinal material.

During this refining, Lei Luo made some manipulation of the amount of auxiliary medicinal materials, and found that after the sword heart grass was placed in it, the reaction in the alchemy furnace was a little more relaxed than before.

Although this alchemy still failed, it also found the right direction for him, that is, he needed to increase the dosage of auxiliary medicinal materials.

After testing many copies, Lei Luo found that it took three auxiliary medicinal materials to neutralize the fierce medicinal properties of the Ten Thousand Year Sword Heart Grass, which means that one medicinal herb can only be refined into thirty parts now.

Fifteen copies were consumed before, and more than thirty copies were consumed for experiments, and the remaining medicinal materials needed to be evenly distributed to the amount of auxiliary medicinal materials, which was only enough for him to refine fifteen copies of the Sword Heart Pill again.

A few days later, looking at the fifteen copies of the Sword Heart Pill in front of him, a trace of sweat appeared on Lei Luo's forehead.

Then after taking a long breath, he silently operated the Divine Cultivation Technique to ensure that his essence and spirit were restored to the best, and he devoted himself to the great cause of alchemy.

Skillfully heating the Dan furnace, skillfully placing the medicinal materials, skillfully controlling the flame, watching the medicinal materials in the alchemy furnace begin to fuse, shrink, and approach Cheng Dan, Lei Luo is meticulous and careful.

Just after Lei Luo thought that he could succeed at the beginning, there was still a problem with this medicinal material.

Taking out the medicinal residue in the alchemy furnace, he closed his eyes and continued to think about what had gone wrong in the process of refining.

When it was confirmed that it was the final fire to be turned into a pill, after the temperature was slightly off, Lei Luo slowly exhaled a breath of turbid air, and then continued the refining of the second part.

Fifteen pills, and in a few days, only the last one was consumed, and Lei Luo's result was an unknown pill that was more than twice as small as the one described on the Sword Heart Pill Formula.

"There is no saying among alchemists that concentration is essence, this pill is considered a failure!" Lei Luo said with a dark face holding this small pill in his hand.

After holding this elixir in his hand and carefully examining it several times, he got a lot of inspiration from the refining process of this elixir, and finally put it up.

Although I failed this time, I learned a lot from the refining just now, and I was also inspired by a lot.

After confirming that he shouldn't make a mistake in the last time, he finally bravely took out the last medicinal herb.

But this time, he made a strange move before refining, and even he didn't know what the meaning of this action was.

Holding the "Chen Yunzi Dan Sutra" in his hand, Lei Luo held his hands high, knelt on his knees, and began to pray sincerely, which actually had an indescribable solemn taste.

The next thing is alchemy, there is no problem with the previous process, even the last place in the sword heart grass is not wrong, skillfully watching the fusion of medicines, the medicinal materials come together, and finally slowly turn into a pill.

Lei Luo couldn't believe his eyes, until the last time he turned off the stove and took out the pill, he couldn't believe that the last time would go so smoothly.

"Chen Yunzi has manifested his spirit?" he joked.

Looking at the pill in his hand, there was a faint exquisite pattern like a small sword on the surface, and the size was exactly the same as the one described in the Dan Sutra, Lei Luo knew that this real Sword Heart Pill had been successfully refined by him.