"Is this the ultimate of the Open Pulse Realm?"

Gu Yusheng felt the changes in his own essence and spirit, the vitality between heaven and earth swarmed in, the vitality in the meridians operated automatically, and the yuan crystals in the dantian also became bright little by little, as colorful as glass.

But without waiting for Gu Yusheng to take a closer look, he was surprised to find that when the vitality of heaven and earth poured into the dantian, there was a dark blue energy between heaven and earth, coming from the depths of the firmament, because this energy was relatively soft, he didn't care at first, but when this energy accumulated more and more in the dantian, between the dantian, the purple mansion, and the divine sea in his body, there was a blue energy gradually floating and filling.

"This is the aura of heaven and earth?"

Gu Yusheng was shocked.

The martial artist fills the dantian with internal strength and gradually transforms it into the true yuan, and the cultivator replaces the true yuan with the heaven and earth vitality to cast the yuan fetus, and finally further breaks through the limitations of the longevity yuan and the shackles of the body, but for the practitioners, in the three realms of the yuan fetus, the open pulse and the calcined bone realm, there is still no way out of the scope of martial arts, and the reason is that the body's soul cannot be further refined, and will eventually age in the body.

The only way to break through is to enter the Soul Condensing Realm, this realm is the ultimate of martial arts, you can fly in the sky, based on the vitality of heaven and earth, transform into aura in the body to refine the three souls and seven spirits, and finally enter the realm of merger, completely transcending the world and transcending mortals.

In other words, within the Soul Condensation Realm, cultivators and martial artists could not directly absorb the aura of heaven and earth.

You can only transform little by little, and accumulate aura in your body through practice.

But now, Gu Yusheng has not yet started to refine his bones, and he has already been able to absorb the aura of heaven and earth.

After keenly noticing this, Gu Yusheng looked at his Yuan Fetus with his divine sense, he was able to open three meridians than others, of course, because the way the True Dragon changed the veins was different, but the core point was that when condensing the Yuan Fetus, the quality of the Yuan Fetus exceeded one grade.

Gu Yusheng used his divine sense to probe the Yuan Fetus at the Dantian, and sure enough, he found that it was different from other cultivators, his Yuan Fetus, when absorbing the Yuan Qi of Heaven and Earth, could also absorb the Spirit of Heaven and Earth.

The aura of heaven and earth is a more refined existence than the vitality of heaven and earth.

Gu Yusheng has read many books, and the records about aura in them all mention that only in the upper realm can there be aura flowing, and although there are also in the human realm, it is extremely thin and can only leak from the spatial cracks in the upper realm.

Among the many books left by Gu Bai, there is a book called Tianhuang Bitan, which roughly records the history of the struggle between the human race and the demon race, 10,000 years ago, the heavens and the earth have changed, and there is a spatial crack in the depths of the wild world, and the aura is sprinkled to the wilderness, so that many demon clans can open their spiritual wisdom, and the demon clan has prospered since then.

But the Terrans went into decline after that.

Gu Yusheng looked at the abnormal Yuan Fetus in his body, and secretly thought to himself: I heard that the demon clan in the Heavenly Demon City is almost exactly the same as a human after being transformed, and now there are many similarities between the cultivation systems and exercises of the human race and the demon race, is it the human race that imitates the demon race, or the demon race imitates the human race? That night, when I was condensing the Yuan Fetus, I felt a mysterious power cast from the depths of the firmament, could it be that the legendary aura leakage? But why did a dangerous aura follow? Could it be that the people of the upper realm are suppressing the human race?

Thinking of this, Gu Yusheng was also taken aback by his own thoughts.

He hurriedly shook his head, putting this absurd idea behind him, if there were gods in the upper realm, they were also human beings, and there was no reason to do so.

But the current situation is that Gu Yusheng found that his Yuan Fetus could absorb the aura of heaven and earth. Isn't this most mysterious force in heaven and earth only controlled by monks in the Merge Dao Realm?

"This matter, you must not consult the elders of the sect, the risk is too great, if there is any taboo in it, I will not recover."

Gu Yusheng slowly collected his strength, and did not take the initiative to absorb the aura between heaven and earth.

"Whew!"

Gu Yusheng got up, at this moment, he felt that the cold air in the cold cave was not so biting, he glanced at the cold air above the cold pool, his heart chuckled, and the whole person was stunned again.

Because he found that the breath on the cold pool was not cold qi, but the aura of heaven and earth rising from the earth's veins.

At this time, the snow ape was sitting on the stone in the middle of the cold pool, motionless like an ice sculpture, but its palms were in the shape of holding the sky, like a stone monkey looking at the moon.

The aura in the cold pool is also constantly being absorbed by the snow ape, although it is in its infancy, and it seems to be frozen, but Gu Yusheng can sense the rhythm of the snow ape's breathing from the heartbeat.

It replaces its own breath with the introduction of Reiki into the body.

Isn't this the cultivation method that the ancient spirit beast mentioned in the secret book of "Blood Refining Mantra" left by the evil cultivator of the Blood Demon Sect passed on through its own bloodline?

"I don't know if I can also inhale the aura of heaven and earth into my body like the snow ape and use it to refine my bones!"

Gu Yusheng muttered to himself, he didn't bother the Snow Ape's cultivation, but came to the Peach Blossom Courtyard and honestly found out the bone refining technique he had exchanged at the beginning, which was the common practice of the Bone Refining Realm monks in Qingyun Gate, and it was also the complete bone refining technique left by the Bai Yujing Holy Land among the three holy places.

The method of bone calcining recorded in this book is very detailed:

Mortals have two hundred and six bones, ancient witches have two hundred and seven bones, and giants in the Northern Wilderness have two hundred and eight bones.

The essence of the cultivation of the Bone Refining Realm is to use the nine meridians opened up to guide the vitality, so that the bones of the body can be strengthened again.

According to the order of practice, from easy to difficult, one should first cultivate the limb bones, then the ribs, then the spine, and finally the brain bones.

However, due to the extremely complex meridians and bones of the human body, and the different talents of people, it is impossible to strengthen all the bones.

Therefore, the Bone Refining Realm is not a watershed in the middle and late stages, but is divided into strength and weakness by the degree of bone refinement, and theoretically, the more bone blocks a cultivator refines, the greatest increase in strength.

It is also reflected in the color of the bones.

It can be roughly as follows: five-grade white bones, four-grade iron bones, three-grade copper bones, second-grade silver bones and first-grade gold bones.

Quenching the limbs, you can condense the five-grade white bone, quench to the ribs, can break through to the fourth-grade iron bone, the third-grade copper bone, you need to strengthen the body's vertebrae, in general, can cultivate the three-grade copper bone, the probability of entering the soul condensation realm is as high as sixty percent, if you can quench the brain bone, even if there is only one, you can also enter the second-grade silver bone, when breaking through to the soul condensing realm, the strong physical fitness, can make the cultivator's soul more stable, and the higher the fit with the body.

As for the legendary first-grade golden bones, not only do they suffer great pain in grinding their bones when cultivating the bone refining technique, but they also need a lot of heavenly and earthly treasures to be refined into pills and medicinal baths, even so, they also need a lot of luck and chance, legend has it that only a few monks with strong innate bloodlines can quench the golden bones, and ordinary people who want to quench the first-grade golden bones either need to raise a thousand-year-old family heritage to be able to use pills and medicinal materials to accumulate, or they are lucky enough to have a trace of possibility.

Different from other realms, the cultivators of the Bone Refining Realm may have refined extremely high-quality bones at the beginning, but over time, without subsequent penance and maintenance of heavenly and earthly treasures, there may be a situation where cultivation has regressed!

In other words, a cultivator who has spent ten years refining to the second-grade silver bone may also have the quality of his bones degraded due to his own slackness and the erosion of time.

This is also the reason why most cultivators stop at this state for the rest of their lives, taking three steps forward and two steps back.

This is specifically mentioned in Qingyunmen's bone refining formula, so the best time to refine bones is two years!

After two years, if there is no additional resource investment, you can only try to condense the divine soul, break through to the next realm, and then go back to refine your bones after the breakthrough.

It is a method that the vast majority of practitioners have to compromise.

"Two years?"

Gu Yusheng's face was groaning.

He has no external resources to assist him at all, that is to say, in the next Bone Refining Realm, he can only rely on his own penance, and no one can help with this.

Even so, Gu Yusheng still wanted to make more preparations.

He glanced at the wine gourd on his waist, intending to let the spirit gourd absorb enough heaven and earth aura, and at a critical moment, he might be able to use it.

While Gu Yusheng was pondering, Yu Guang looked at the sect order hanging on the wall of the outer courtyard.

The elders of the sect returned the sect order to him, but the person who sent the token didn't even see him, and directly hung the sect order for him.

"I don't know how many sect contribution points I can exchange for the last demon hunting points."

Gu Yusheng took off the sect order and walked towards the hall of things.

Although he doesn't have free sect contribution points to receive, but in the last Demon Hunting Forest trial, if someone else gets sect contribution points, then he should also have them.

Since the Bone Refining Realm needed a large number of medicinal materials as resources, he also wanted to secure some useful resources for himself.