The Blood Exchange Realm, like laying the foundation, nourishing qi, and refining bones, is divided into the Nine Heavenly Realms.

In this realm, the meridians of the whole body are officially opened, so that the qi and blood can flow backwards, and the blood of the whole body and the vitality of the whole body become one.

Exchange transfusion, as the name suggests, is the replacement of blood in the body.

The human body has its own hematopoietic function, even ordinary people, after decades of internal and external material exchange, the blood in the body will be renewed.

However, the cultivation of the Blood Exchange Realm is to speed up this speed extremely, that is, it must stimulate the body's hematopoietic function a thousand times over.

The original blood in the body will be absorbed and then condensed into waste products and excreted through the pores.

In this process, the qualitative change of blood is realized, and the degree of essence is effectively improved.

The Nine Heavens of the Blood Exchange Realm are named after the nine colors of red, orange, yellow, green, blue, purple, black and white, but it does not mean that the blood in the body changes color, it just means that when the blood qi is running, it will faintly emit the light of the corresponding color. For example, Wu Feng's cultivation of Dongchen Sword and Electricity, attracting star power into his life, occasionally emitting golden light from his pupils and blood during his weekday cultivation, would become extremely advantageous in his cultivation in the Third Heaven.

When entering the Jinghai realm to the next level, the blood light will return to the red color of the origin, but there is an essential difference, which can be called a return to the basics.

The Blood Exchange Realm attaches great importance to the cultivation of blood qi, and after the qualitative change of blood, the blood and qi around the body are surging, and the energy stored is far better than before. This realm itself does not improve much for the first force, but if the foundation is consolidated, the supreme martial artist only needs to exude a huge amount of blood on the battlefield, even if he doesn't say a word, he can also shake thousands of troops, and at the moment of life and death, he can even launch a blood explosion, shoot blood out of the eyes and even skin cracks, and deliver a fatal blow to the enemy!

The reason why Wu Feng was able to successfully kill Yuan Shu was mainly because the gap between the hard power of the Bone Refining Realm cultivation and the Blood Exchange Realm cultivation was not incredibly large. In fact, if they cooperated properly, it would be possible for the three martial artists at the peak of the Bone Refining Realm to kill the peak powerhouses of the Blood Exchange Realm.

Of course, if it is one-on-one, the difference is a big realm, even if the weak side is talented, the foundation is stable, and the combat skills are skilled, if there is no hole card beyond the ordinary, there is still no chance of winning.

Wu Feng had already grown up, and the north wind was hunting, blowing his clothes flying.

The light in his eyes was solid, against the bright shadow of the moon.

The bone power he had absorbed before burst out in his body in an instant, radiating tremendous heat!

Although Yuzhou is located in the heart of the Central Plains, the degree of cold in winter is similar to that of Jizhou. Now it is a harsh winter, and the natural weather is cold, and the muscles and bones of the head are broken. However, under this huge heat, Wu Feng sweated like rain all over his body, and his clothes were soaked in an instant!

The power of the bone inscription that had been absorbed into Wu Feng's body before was burning wildly at this moment. Even if it is a unicorn beast with impure blood, his cultivation is not much higher than the current Wu Feng, and the energy contained in the true bones left behind can be called as vast as the sea, if Wu Feng is not impacting the blood exchange realm at this time, this energy is enough to burn him to ashes in an instant.

The true qi in Wu Feng's body was running wildly, like a speeding wheel on the avenue, and the golden and red light flashed alternately in his body, and the frequency was so high that it was difficult to distinguish.

The realm of calcining bones is to exercise bones, and bones are the organs of human hematopoiesis, so the realm of calcining bones and the realm of blood exchange form a subtle connection.

Wu Feng was at this time when his muscles and bones were strong, and under the drive of true qi, the hematopoietic function in his body was running rapidly, and at the same time, the pores around his body were wide open, dissipating excess heat, and excreting waste and sweat from the body.

Under the rapid operation of the true qi, Wu Feng seemed to have turned into a fire man, his body temperature rose rapidly, and soon reached the point of blazing, the sweat was discharged to the surface of the body, and quickly evaporated in an instant, and the waste condensed on the skin, turning into black dust and mud.

A martial artist's ability to tolerate heat naturally surpasses that of ordinary people, but it is also Wu Feng who is now in a special state of cultivation, otherwise such a high body temperature is still not something that the human body can bear.

His mouth and nose also fluttered rapidly, grabbing the moisture in the air to make up for the depletion of water in his body, forming a subtle cycle.

The ground was covered with ice and snow, and the heat emitted by Wu Feng evaporated into water vapor, which made the dry air instantly moisten.

From a distance, Wu Feng looked like a steamer, his whole body was surrounded by hot white mist, but he looked like a dragon swallowing clouds and spitting mist.

In the white air, there is a faint reddish brilliance. This was a sign that Wu Feng had already sensed the threshold of the Blood Exchange Realm.

Powerful blood qi erupted from the white mist, heading straight into the sky and clouds, with the momentum of shaking the stars and moon.

The bones of his whole body made a popping sound like fried beans, which was a reaction after the hematopoietic function was strengthened thousands of times in an instant, and fresh blood poured into the blood vessels like a tidal wave, bringing huge pressure, coupled with incomparable heat, making Wu Feng feel as if his body was about to burst open!

The pain was so great that his face was distorted.

It is undoubtedly extremely dangerous to rush several great realms in a row, and if one is not careful, he will die. Although the Heavenly Yang Body can capture the luck by killing the luck person, the luck obtained is far less than the luck person itself, and it is only a small part. Wu Feng rushed through the level this time, which was simply burning the only luck he had left now.

But in his eagerness to improve his strength, he didn't want to think about it so much at all. He is confident that with his resourcefulness, he can kill more luck people who are enemies of him, and there will never be a shortage of luck in the future!

The tearing pain made Wu Feng's spirit also become trance-like, but the powerful willpower still controlled the energy operation of his body at the subconscious level.

In this process, there are endless dangers, but Wu Feng relies on steel-like willpower to let it be endless ups and downs, and it will be crushed!

If you forcibly break through the great realm, you will often see all kinds of terrible illusions, which are transformed by demons. But now Wu Feng is in a trance, but he doesn't see any illusions of heart-shattering, but he just feels the pain on the **.

Maybe after so many things, he has found the root of his heart, and with the high fit of the Qilin's true bones, there is no interference from demons in this process.

The essence in the blood swirled, more and more condensed.

Finally, Wu Feng let out a long roar like an earth-shattering roar!

The white mist exploded, and Wu Feng's clothes on his upper body also burst, turning into debris and scattering all over the sky.

His body was covered in a gray shell of black dirt, old blood that had been burned and drained from his pores.

But I saw Wu Feng stretch out his arms, his body shook, and the black dirt shook out, turning into dust and rain in the sky, drifting away one after another, without the slightest residue on the surface of his body, Wu Feng's body instantly became clean, as if he had taken a bath.

A warm red glow emanated from his veins, flowing slowly, with a bright breath of new life.

After a night of penance, now that it is almost dawn, Wu Feng has finally broken through to the first heaven of the realm of blood exchange - the realm of red blood!