After a short time, Xu Qingqing was so tired that he was sweating profusely, and the consumption of true qi in his body was less than half, and his spirit was also depleted.

If she continued like this, she would have to purify a third of the medicinal materials at most, and she would have to swallow the pill to replenish her true qi to maintain it.

Rough step estimation, but also to recover the true qi four or five times.

In this way, the true qi must be mottled and impure, and the medicinal power extracted will also be greatly reduced, affecting the effect of the elixir.

"Is it almost extreme?"

He Qingfeng sighed.

After all, it is a top-grade pill, and the dispensing of Tianxin Hui Yuan Dan is indeed a bit overwhelming to let a middle-grade Dan master purify it.

Especially, for the consumption of the mind.

So far, I can only do my best and obey the destiny of God.

Shaking his head, He Qingfeng retracted his mind and firmly controlled the medicine furnace.

"No, I have to insist. ”

Xu Qingqing swept the corner of his eyes, caught the helplessness in He Qingfeng's eyes, gritted his teeth, and forced himself to lift his spirit.

Master has been so kind to her that she must not let him down.

Qin Hao, I'm sorry.

Reciting a sentence silently in his heart, Xu Qingqing's heart moved, and he used an improved version of the Thousand Illusions Technique to purify the medicinal materials.

Connection.

The intense consumption of true qi in the body was reduced by half at once, and even the spirit was much clearer, and there was no sense of emptiness.

That's it.

The key is that she can clearly feel that the refined medicinal liquid is also much purer than before.

"It's amazing, it's hard to imagine, how terrifying it would be if you cast a real thousand illusions. ”

Even Xu Qingqing herself was shocked.

Whoosh!

With the help of the Thousand Illusion Technique, the speed at which she refined the medicinal materials accelerated, and one by one there were medicinal liquids, which were thrown into the medicine furnace by He Qingfeng.

He Qingfeng used the fire trick to trigger the thousand-year-old earth fire.

Exhaled, a fiery breath emanated in the Great Dan Room, and even the air was filled with oppressive heat, as if it had been scorched.

At the bottom of his heart, mania suddenly rose, and the whole person became drowsy.

He Qingfeng hurriedly held his breath and condensed, calmed his mind, carefully controlled the thousand-year-old earth fire, calcined the medicine furnace, and began to refine the elixir.

The earth fire has been burning for thousands of years, and the flames contain a strange tyrannical atmosphere.

Once affected, consciousness will be swallowed up and will become a walking corpse, like a berserk beast that only knows how to kill.

Another example is the return of fire to the element, absorbing the earth fire for cultivation all year round, and forming fire poison in the body, which is difficult to remove.

When a sea heart vine was refined, Xu Qingqing's true qi was only one percent left, and when he looked up, he saw that half of the medicinal materials had been refined.

Hurriedly swallowed a pill, felt the true qi in the dantian recover, and rolled up another medicinal herb to refine.

When she swallowed the second pill, when her true qi was about to pass halfway, she finally refined all the medicinal materials and put them into the medicine furnace.

Airplanes!

In the medicine furnace, the energy was raging, like a fierce beast trapped, launching a crazy impact.

Bang bang bang!

The dull sound, like thunder passing through, made Xu Qingqing frightened.

Fortunately, this medicine furnace is also a magic weapon, and with He Qingfeng's skillful control, this power can be suppressed.

This is the process of Ning Dan.

Dozens of rare spirit grasses, all of which contain powerful medicinal powers, and their properties are different, it is not an easy thing to condense into a pill.

And this is also the most difficult place to refine high-grade pills.

Once the true qi is not good and cannot withstand this impact, it will be a failure.

Therefore, every alchemy master is also a strong martial artist.

It is said that when the pill reaches the level of Bao Dan, it can produce mysterious changes, it can fly through the air, and it also has a powerful attack power, and it can kill the grandmaster real person with one blow.

Therefore, Bao Dan can only be refined in the realm of heaven and man.

Crash!

Immediately afterwards, a stream of water sounded, accompanied by a rich aroma, with an indescribable scent.

Is it going to be refined?

Xu Qingqing's eyes widened, and she thought in surprise.

The sound of the flow of water, which is the liquid drumming, is a sign of Cheng Dan.

Sensing the changes in the medicine furnace, He Qingfeng's pale face also showed a look of surprise, and he continued to make one handprint after another, controlling the calcination of the thousand-year-old earth.

Tianxin Huiyuan Pill is recognized by many alchemy masters as one of the most difficult pills to refine among the top-grade true pills.

If he can refine it, it will also be a big improvement for his alchemy.

"The medicine is mutually reinforcing, and the yin and yang of the pill are one. ”

Just when Xu Qingqing was surprised, Qin Hao's words suddenly sounded in his ears.

With a bad premonition in his heart, Xu Qingqing took a deep breath, his mind was highly concentrated, and he sensed the changes in the medicine furnace.

The earth fire swallowed and jumped, looking hideous and terrifying, like a flame devil.

Rumble!

With this refining, He Qingfeng's true qi and mind were consumed violently, and he was anxious to condense the pill, and as soon as his spirit was relaxed, the thousand-year-old earth fire took the opportunity to burst out and swept towards him.

He Qingfeng's expression changed suddenly.

In a hurry, he slapped out a palm, brought out a tornado, and swept the flames aside.

"Not good!"

Suddenly reacted, Tianxin Hui Yuan Dan was still refining, and He Qingfeng's face was miserable.

That's it.

With his alchemy, it is already good to be able to do this step.

When I looked back, I was stunned.

I don't know when, Xu Qingqing came to the medicine furnace, his handprints changed again and again, revealing a mysterious aura, and he was carefully controlling the thousand-year-old earth fire.

"Hurry back!"

Suddenly, He Qingfeng's expression was solemn, he roared in a low voice, and slapped a palm wind, rolling Xu Qingqing to his side.

Sou!

A fire python appeared out of thin air, opened its mouth, and swallowed a void.

Xu Qingqing's eyes widened, with a frightened expression on her face, if she stayed where she was, she would definitely be devoured by the earth fire.

That will end well, and it will never be good.

Bang!

Just then, a violent explosion rang out.

Needless to say, it's definitely a fryer.

The two of them looked up, and sure enough, in the medicine furnace, a puff of black smoke was constantly coming out.

Fortunately, the medicine furnace is a magic weapon level, and it is abnormally hard, but it has not been damaged.

"Master, I'm sorry. ”

Xu Qingqing said guiltily.

"It has nothing to do with you, with my alchemy, it is already difficult to refine the Tianxin Huiyuan Pill, and it is expected that this will happen. ”

He Qingfeng smiled bitterly, shook his head and said.

"Bullnose, are you alright?"

At this moment, a figure rushed into the Great Dan's room and shouted.

"See the master of the door. ”

Seeing the face of the person who came, Zhao Qingqing hurriedly saluted.

The person who came was the master of the Huoyuan Gate, and he was empty.

"I'm not dead yet, it's just a pity. ”

He Qingfeng coughed twice, reluctantly glanced at the medicine stove, and said.

Originally, he was only 30% sure.

But I didn't expect that I would be able to persevere until I was about to become a Dan.

Those who travel a hundred miles are half ninety.

There is both lament and regret in my heart.

"Perhaps, that's how it should be. ”

Lie Xingkong's face darkened, and he shook his head and said.

It seems that he must also prepare as soon as possible, so as not to leak the news and be caught off guard.