Behind the dark inner chamber, there is an occasional light that comes on.

Xiao Ai stood in the room, looking at the medicinal herbs all over the ground with a distressed expression, and his face was extremely strange.

Looking up at Du Fei, who was sitting cross-legged on the bed and slowly pranayama, she didn't know what it felt like for a while.

This young master of his own family doesn't seem to be the one he knows for a long time, but after less than half a year's effort, what he knows and understands, it seems that he has no way to understand it at all.

And in this way, can I still stay with him?

After a slight pause, Xiao Ai quickly threw this idea out of his head. This kind of thinking is absolutely undesirable.

"What's wrong?"

On the bed, Du Fei slowly opened his eyes, stared at Xiao Ai for a moment, and then smiled.

"No, I just think that the young master is much more powerful than before. Xiao Ai stuck out her tongue and said cutely.

"Is it?, why don't I feel this way myself?" Du Fei laughed all his life, then clapped his hands, and said in a low voice, "Okay, you have to help me well, young master, I am also the first time to officially alchemy, it is rare to find a coolie, I will not let you go!"

As he spoke, Du Fei squinted for a moment, and after thinking about the prescription for refining the marrow cleansing pill in his mind for a while, he clapped his hands slightly, and suddenly a stream of true qi rushed out from between them, and instantly fell on the medicine pod in the middle of the house.

"Hum—"

Although it was the same medicine tripod, it was completely different from before in that with the injection of Du Fei's true qi, this medicine tripod actually slowly levitated. On top of the original simple body, there is also a faint blue streamer flashing, forming a mysterious picture.

Looking at this scene for a moment, Du Fei couldn't help but sigh in his heart, sure enough, this alchemy after having true qi is completely different from the alchemy that has reached the extreme before!

Squinting at the medicine tripod in front of him for a moment, Du Fei gestured to Xiao Ai to retreat, and then stretched out his right hand and gently tapped it at the center of his eyebrows.

With Du Fei's action, a mysterious spiritual power instantly burst out from the center of his eyebrows, enveloping the medicine tripod in it.

After a moment of careful induction, Du Fei was slightly shocked to find that although this medicine pod looked extremely ordinary on the surface, it had its own space inside, and between the upper and lower sides, there were strange holes that connected the two together, but these holes seemed to be invisible with the eyes.

After sensing it slightly, Du Fei destroyed the true qi, and the rich true qi slowly rushed into the bottom of the medicine pod.

"Whew-"

With Du Fei's movements, there were flames at the bottom of the medicine pod suddenly, and these flames were blue, which seemed to have a bit of a cold aura, but Du Fei knew that it was because of the transformation of his true qi.

Xiao Ai on the side saw this scene, and he was also slightly stunned for a moment. Although he also knew that the alchemy technique was extremely mysterious, he didn't expect that after his young master used it, it would be so mysterious.

Without paying attention to Xiao Ai's expression, Du Fei contemplated for a moment before whispering in his heart: "Xiaobai, if I switch to using the medicinal power of the Condensing Pill to refine the pill now, will the success rate increase?"

"Beep-Question accepted, system searching, start loading data-"

"According to the analysis of the current situation of the residents, if you use the method of refining the pill with Dan, the success rate will drop by two percent!"

"You actually know that Dan is alchemy...... Isn't it!?down?" Du Fei complained halfway, and suddenly couldn't help but whisper in his heart.

"Yes, the master's strength at the moment, if it is used to use the alchemy method, it will only reduce the efficiency of alchemy, so Xiaobai does not recommend it!"

"Uh-"

After being speechless for a moment, Du Fei slowly shook his head and immediately opened his eyes slightly.

Since you can't use the method of alchemy with qi at this moment, let's use alchemy with qi.

Anyway, what is to be refined at this moment is only the Nine Rank Pill, and it should be able to do it with Qi Alchemy.

With a slight movement in his mind, Du Fei once again urged the true qi in his body, all of which poured into the medicine tripod in front of him, and the spiritual power also slowly urged, and began to subtly control the heat in the medicine tripod.

After a while, Du Fei felt that the temperature of the medicine pod had stabilized, and then he took a slight breath and said in a low voice, "One piece of stone heart." ”

Hearing this, Xiao Ai on the side quickly found a medicinal herb from the medicinal materials all over the ground and handed it to Du Fei.

Du Fei took it casually, hesitated for a moment, and had already thrown the stone heart into the upper part of the medicine pod.

As soon as the stone heart chalcedony entered the medicine pot, Du Fei didn't have time to react, when he heard a "snort-" sound, and a stone heart chalcedony had all turned into a charred black color.

"Is the heat too high?"

In the face of his failure this time, Du Fei didn't feel anything, after all, he also knew that the alchemy at this moment was completely different from the previous method like the turtle, and the previous experience could not be borrowed at all, at this moment, he was like a novice.

"Come again!"

Xiao Ai on the side heard this, glanced at Du Fei with a little worry, and then handed over another piece of stone heart.

It's just that this time Du Fei didn't reach out to pick it up, but with a movement of his heart, his spirit quickly wrapped the past, and he threw the stone heart into the medicine pod.

Although Du Fei's mental strength is not strong at the moment, he can still do this kind of action.

This time, with the wrapping of spiritual power, the stone heart did not turn into ashes in an instant.

And Du Fei also quickly withdrew a bit of true qi, and then slowly withdrew the spiritual power wrapped in the stone heart chalcedony, and watched the stone heart chalcedony fall into the medicine tripod.

"Whew-"

Perhaps it was Du Fei's luck, this time, the stone heart did not turn into ashes, but after rolling in the medicine pod for a while, it formed a viscous substance like a milky white liquid.

"Not bad!" asked with a smile, and Du Fei gestured casually.

Xiao Ai had already quickly found a jade box and placed it on the ground.

The true qi in his hand dispersed slightly, and then Du Fei's right hand was in mid-air for a moment, and he saw that those viscous liquids had slowly flown out of the medicine pod, and immediately fell into the jade box.

Immediately, Du Fei's mind moved again, and another piece of stone heart chalcedony fell into the medicine tripod......

............

Time passed minute by minute, and during this period, Du Fei didn't know how many times he stopped to rest because his true qi was exhausted.

It's just that the hard work of the two of them is not useless, and under the hard refining, those medicinal materials have basically turned into medicinal liquid.

His eyes swept over the four refined medicinal liquids in front of him, but Du Fei's face became more and more serious.

The previous ones were just a small test, and the most important thing was that Ning Dan was the time to test his skills.

Although Shan Dan Fang explained Ning Dan's technique in great detail, he is a novice after all, and his experience is completely zero!

After hesitating for a moment, this time Du Fei didn't dare to use his spiritual power in vain, but carefully took out the required medicinal liquid from the jade box and poured it into the medicine tripod, and then slowly injected his true qi.

"Whew-"

With the injection of true qi, even the upper part of the medicine tripod suddenly had a scorching flame bursting out, instantly enveloping the medicinal liquid in it.

This change made Du Fei almost take back his true qi.

Fortunately, after waiting for a few minutes, the flame in the upper part slowly disappeared, and the four medicinal liquids were also slightly entangled together, constantly mixing under the burning of the flame.

Sensing this change, Du Fei exhaled slightly, and immediately urged the true qi again, and at the same time, the spiritual power also diffused in an instant.

"Whew-"

With Du Fei's movements, this time, the mixed liquid medicine rolled rapidly, and some of the impurities in it seemed to quickly turn into white smoke and disappear into the air.

And the liquid medicine also gathered together quickly, faintly forming the shape of a pill.

"Is it going to be done?"

Du Fei took a sharp breath, the true qi urged more quickly, and the flames below instantly boiled, and almost in the blink of an eye, all the water in the pill had been blown away, and under the aggregation of spiritual power, the pill continued to roll like a mud pill.

"Condensation—"

With a low snort, Du Fei's hands changed again, and suddenly a strong spiritual power diffused out, and he squeezed the pill into a thumb-sized ball, and then the true qi flame shook violently, and the pill took shape.

"Hum—"

In the gentle vibration, a medicinal fragrance permeated out, and the room was filled with fragrance in an instant.......

"This is the elixir, not the kind of half-finished waste anymore!" Staring at the elixir in front of him, Du Fei's face was overjoyed.

Although this was only a low-level elixir, this was the first time that he had refined an elixir by himself.

Although he found a bottle and stuffed the pill into it, Du Fei smiled, and then threw the bottle to Xiao Ai.

Slightly flustered, Xiao Ai glanced at Du Fei and said, "Young master......"

"This myelin-washing pill should be able to help you break through to the realm of the Nine Rank Martial Artists, girl, don't dislike it!" glanced at Xiao Ai with a smile, and Du Fei said slowly.

"This ...... Since the young master said so, I will accept it as a commission. A smile flashed in his eyes, and then Xiao Ai said in a low voice.

"You're shrewd!" Du Fei laughed, and then the smile on his face relaxed, "But then, it's not so easy...... Come, I'll continue alchemy!"

"I want it!" Xiao Ai snorted, but he didn't refuse, but quickly sent what Du Fei needed.

And with the first experience, this time Du Fei also let go of his hands and feet, and after recovering his true qi slightly, the spiritual power in the center of his eyebrows continued to surge.

And with the surge of spiritual power, alchemy has been carried out again......

Unconsciously, time passed slowly, and with the passage of time, there were occasional loud noises in the inner room, but most of the time, it was the fragrance of medicine that diffused out, which made the heart feel relaxed......