The cultivation in the world is not only a martial arts, but also alchemy, runes, secret methods, poison skills, etc., all kinds of which emerge in endlessly.

These practices operate independently of each other, but they have one thing in common, and that is that all practices rely on the aura between heaven and earth.

Among them, in addition to martial arts cultivation, the most important thing to grasp in the use of heaven and earth aura is the refining of pills.

Although an elixir is only the size of a projectile, the refining process is very complicated.

The alchemist needs to take the medicinal plant, essence blood, and spirit core as the basis, according to the amount and heat recorded in the ancient Danfang, and then combine the alchemist's own understanding, fill the medicine furnace in the most appropriate order, and then draw the spiritual energy of heaven and earth into it, and condense it to become a pill.

Among them, thousands of details can only be experienced one by one when refining medicine.

In addition, the pill is consistent with the cultivation of martial arts, there is a division of realm grades, heaven and earth Xuanhuang is the main body, and the details are divided into eleven levels, increasing from one to ten, until the end, it is the divine product Ji Dan that only exists in the legend.

And the "Vital Pill" that Xingying said could save Ye Bing's life was not too high-grade, but it was also a four-grade pill.

Looking at the scroll floating in the air in a daze, Ye Chen's face suddenly sank.

Let him, a poor student of physics and chemistry who has never refined a pill, refine a top-grade four-grade pill of the Yellow Order, it is better to directly say that Ye Bing is destined to die this time.

Pulling the corners of his mouth, Ye Chen wanted to say something, but the moment his gaze shifted, he saw seriousness in Xingying's eyes.

When she looked at Ye Bing again, the girl leaning on the corner frowned, and the pain of torn body and mind was difficult to escape even if she was unconscious, if it weren't for Ye Bing's strong belief that she wanted to live, this hell would have been gone for an unknown number of times.

Ye Chen's ten fingers clenched, he gritted his teeth and picked up the scroll floating in front of him, and said in a deep voice: "Okay, I'll practice!" ”

Xingying nodded, her eyes relieved.

"This is the nine chapters of the fragment of the Dan Sutra that I brought down from the Seven Star Saints, and one of the chapters is the refining pill recipe of the 'Guiding Pill'."

She explained, "This recipe contains the mantra for inducing qi when the final condensation pill is condensed, but I would like to remind you of—"

"Before refining the pill, memorize the content of the pill to prevent the slightest mistake from destroying the pill."

After making the last reminder, Xingying slowly turned her back.

"If you want to save Ye Bing, she can only do this, her will to live is very strong, but at most she will last until the beginning of the morning sun tomorrow morning."

In the western corner of the barren mountainous area, only the last semicircle of the sunset remained, and the oblique light entered the cave, Xingying walked to the entrance of the cave, turning into a seven-star divine sword and emitting a brilliant colored light.

"And now, it's getting dark."

As the words fell, colored light covered the entire cave, hiding all the breath here.

Since the Ye Clan Clan Conference, Xing Ying only had half of the strength of the Qi Induction Realm left, and now it was already her limit.

The time that this aura barrier can last is very short, and like Ye Bing's fate, it will last until tomorrow morning, when the sun rises.

At this moment, all the pressure went to Ye Chen's body.

"A mortal medicinal plant that can absorb and store spiritual energy, a drop of third-order essence blood, and a spirit core that can't be lower than the third-order?" Sweeping over the materials needed to refine the Destiny Induction Pill on the Dan Fang, Ye Chen frowned.

The description above is very vague, there is no detailed explanation, such a pill seems to relax the choice of materials, but in fact, it is the most difficult pill to refine, there is no one.

The so-called elixir is to blend the clear medicinal plant, the designated essence blood and the inherent spiritual core, make up for each other, and achieve a certain medicinal effect after practice.

Sighing, Ye Chen sat cross-legged, and when he saw the epilogue at the end of the Dan Fang, he closed his eyes and began to meditate on the spiritual breath of heaven and earth in this mountain range, and comprehend the content of the Dan Fang.

Minutes and seconds passed, the sun set into the mountain stream, and night gradually fell.

The originally silent barren mountain range, from time to time there was a strange whisper, the gravel gap at the entrance of the cave, inexplicably gave birth to a green shoot, with the shift of the moonlight, all over the mountain, began to have a little vitality, suddenly, the world changed suddenly.

Ye Chenpan sat in the cave, and a long time had passed.

In front of him was the scroll of the "Dan Sutra", and the realm of divine consciousness was empty, only his own consciousness body hung above the sea of consciousness, and the aura was surrounded by aura, sometimes condensed, sometimes scattered.

"I see!" Suddenly, Ye Chen opened his eyes.

He jerked to his feet and looked at the entrance of the cave.

Through the Lingxuan barrier, the world in front of him has also changed, the barren and barren during the day is completely different from the vitality at night.

The Destiny Pill is to reintroduce the depleted life into the aura of heaven and earth and revive, just like the territory of this lord-level king beast, countless living beings are rejuvenated after its silence in the middle of the night.

"Between heaven and earth, where all the grass that grows, which one can't absorb and store spiritual energy?" Ye Chen laughed.

The requirements for medicinal plants in Danfang are actually no requirements!

Knowing this, Ye Chen immediately took out a clean herb from Ye Bing's spatial ring, and at the same time took out a copper furnace for refining medicine.

After lighting a fire and placing the copper furnace medicine pod on it, Ye Chen took out the mutated wild pig beast demon core from his spatial ring that was about to surpass the third order.

The mutated third-order demon core is equivalent to the fourth-order, which also meets the requirements of Danfang.

"There's only one drop of blood left now." Ye Chen muttered to himself.

The heavens and the earth are rejuvenated, and the cave is full of spirit animals.

It was almost not difficult to extract a drop of the essence blood of a third-order spirit beast.

But Ye Chen always felt that the drop of third-order essence blood that Dan Fang was referring to would not be so simple.

"If it doesn't matter if the herb and the spirit core don't matter, then it can only be to make a fuss about this essence blood, after all, the essence blood of the spirit beast or the demon beast, if it really doesn't make a request, then the residual blood and essence blood on the spirit core are no different, so why do you need to mention it separately?"

"Wait!" Ye Chen sorted out his thoughts, and suddenly frowned, as if he had thought of something.

He raised his hand to condense a cyclone, fixed the spirit core in mid-air, and leaned over to pick up the Dan Jing scroll on the ground.

Opening to the page of "Inducing Destiny Pill", he re-observed the text on it, "Effect! Effect! The Destiny Pill can lead the aura of heaven and earth into the body and revive life. ”

Suddenly, a flash of light flashed in Ye Chen's eyes, he took out the dagger, squatted down, and repeatedly calcined on the handful of flames under the copper furnace.

Soon, the iron dagger tip turned red under the scorching fire.

Ye Chen's palm was protected by spiritual energy, and he didn't feel hot, he stood up, took the dagger, and walked to Ye Bing.

At this time, the girl didn't know whether she was asleep or unconscious, her expression was indifferent, not as painful as before, but her face was still as white as paper.

Ye Chen's eyes changed, he held the dagger in his backhand and stabbed it in the middle of Ye Bing's eyebrows-

His eyebrows furrowed slightly, and he quickly returned to his original calm.

Carefully picking up the drop of essence blood, Ye Chen tiptoed back to the copper furnace, according to the Dan Fang's instructions, took off the herb, wrapped the spirit core, and finally dropped this drop of essence blood on it and threw it into the medicine furnace.

Suddenly, the three objects in one instantly annihilated in the high temperature, and at the same time, Ye Chen's hands were sealed, attracting the spiritual aura in the cave to enter, forming a cyclonic blister, enveloping the essence that had been annihilated into mist.

In the next moment, the water bubble gradually shrank under the temperature of the fire, and faintly showed the rudimentary shape before the pill was formed.

Seeing such a scene, Ye Chen's brows were deeply locked, he was engrossed, and after meditating on three breaths in his heart, the hand that attracted the aura slowly half-clenched into a fist.

He whispered, "Ning Dan! ”

The bubbles condensed and contracted in response, and in an instant, the rich energy fluctuated.

However, in the next second, the fluctuating aura exploded in the Ding Furnace, and the powerful thrust directly shook Ye Chen back and hit the stone wall.

"Bang-"

The furnace shattered, and a puff of black smoke rose.

Ye Chen stood up holding his chest, stunned, looking at the ruins with a blank look.

"Failed?!" Blood overflowed from the corners of his mouth, and the young man gasped and swayed, "Damn! Sure enough, it's still too reluctant......"

He turned his head to look at Ye Bing and said with a wry smile: "Sister Ye Bing, I'm sorry ......."

Before the words could be fully spoken, suddenly, a fresh fragrance came to my nose.

Ye Chen hurriedly turned his head, and in the ashes of the Ding furnace that exploded in front of him, a blood-colored pure pill rose into the air, and the entire cave was suddenly overflowing with the fragrance of medicine.

"This rich Dan incense ......" Ye Chen muttered to himself: "Inducing the Pill, I have refined it!" ”