In the past three days, Li Changsheng has initially perfected the missing steps in the Book of Blood, and successfully purified the blood of the sturdy earth dragon, and successfully obtained the brass dragon blood.

The brass dragon bloodline is of the same order as the black dragon bloodline. Because the solid armor earth dragon contains pure brass dragon bloodline, during the period, the purification failed countless times, and the number of successes is very small. As a result, Li Changsheng finally obtained only one test tube of brass. Dragon blood.

　　 Such a bit of brass dragon bloodline, even if it is absorbed by a fairy who does not possess the bloodline, the brass dragon bloodline obtained will be of inferior quality.

From the perspective of extraction rate, it is about 5%, but as long as he is proficient, Li Changsheng is confident to increase the extraction rate to 10%. As for the higher extraction rate, unless the upper half of the book of blood is collected, Otherwise it is almost impossible.

　　 After replacing a few steps, the extraction rate of 10% can be reached in the end, which is quite amazing, enough to prove the power of "Book of Blood".

　　 This time, Li Changsheng prepared to extract the blood of the black dragon.

　　 Li Changsheng first cut open the heart of the venom dragon, releasing a large amount of blood, and then put a certain amount of boiling grass powder into the bucket of the venom dragon's blood.

　　 The next moment, the three buckets of venom dragon blood began to boil, and a large amount of water vapor gushed out crazily. If you sniff it carefully, you can hardly smell the **** smell.

　　 Boiling grass powder can quickly evaporate the water in the blood without destroying the important components of the blood.

About ten minutes later, the blood of the three venom dragons no longer boiled. Under the magical effect of boiling grass powder, the blood of the venom dragons all condense into a large dark red blood clot, which is a large amount of blood loss. which performed.

　　 These blood clots can be called blood essence, and it is also the first step to purify the blood of the black dragon. Although there is only one word difference from the blood essence, there is a clear difference between the two.

　　 After completing the least technical first step, Li Changsheng put the coagulated blood essence into a special container, and gradually stripped out the useless magazines in the blood, leaving only the pure blood.

　　 There has been a lot of research on blood extraction in this world. There are many methods to gradually extract impurities in the blood, but many people cherish themselves and keep secrets. It is difficult to obtain more in-depth knowledge of blood purification.

　　According to the extraction rate of "Book of Blood", this is undoubtedly the top blood purification technology. Unfortunately, Li Changsheng only got half of it, and had to use the knowledge reserves of Yuanling Academy to make up for the missing parts as much as possible. This directly caused the extraction rate to drop significantly, but it was still in the category of top bloodline purification technology.

　　 This is the power of "Book of Blood"!

　　With the passage of time, Li Changsheng gradually put in some powders, medicines and objects, and extracted the magazines in the blood essence step by step.

　　 About an hour later, most of the blood essence in the original three barrels has disappeared, leaving only a small barrel of thick black and red liquid. Under the light of the light, you can vaguely see the black brilliance.

　　 The basic bloodline purification methods have been processed, and the next step is the "Book of Bloodline Part 2".

　　 At this time, Li Changsheng took out a special tube of medicine, raised his head and drank it. This is a special secret recipe from "The Book of Blood". The production process is not complicated. It can make a huge change in Li Changsheng's vision.

　　 The next moment, Li Changsheng's pupils suddenly changed, as if they became even smaller than the tip of a needle, faintly revealing a special light.

　　 Looking at the black and red viscous liquid, Li Changsheng's eyes were enlarged to the extreme, and the viscous liquid continued to enlarge until he saw mysterious chains.

　　 Thousands of blood chains are constantly intertwined and entangled, forming a large and complex texture together, which seems to be gestating a powerful force.

　　 This is the bloodline chain belonging to the Venom Flying Dragon. Its bloodline structure is huge and complex, constructing a complex bloodline imprint.

　　 Among these bloodline marks, there are bloodline marks of various creatures, including the bloodline marks of the black dragon.

　　In front of Li Changsheng's eyes, most of the bloodline chains are relatively dim, and they can't even be combined into bloodline marks.

　　 Venom Flying Dragon has seven different bloodline imprints. Simply put, the bloodlines of seven creatures can be extracted, including the bloodline of the black dragon.

　　 Among the seven different blood marks, Li Changsheng locked the only blood mark that exudes brilliance.

　　 Even if he just stared at him, Li Changsheng could feel a slight pressure, and he could even hear the majestic dragon roar in the spiritual level.

　　 This is the blood mark of the black dragon!

　　 In addition to the blood of the black dragon, the other six bloodlines can be described as worthless. The next step for Li Changsheng is to extract the black dragon mark as completely as possible to obtain the real blood of the black dragon.

　　 If you want to purify the blood of the black dragon, the easiest way is to remove all the six inferior blood and the mixed blood chain, leaving only the blood mark of the black dragon.

　　 In the Second Half of the Book of Blood, in addition to the special medicine that allows Li Changsheng to continuously zoom in, there are also several special solvent formulas.

These formulas of dissolving agents can be used to dissolve different levels of blood vessels, some are for lower blood vessels, some are for middle and high blood vessels, and there is even a special dissolving agent that can be used to block blood vessels of the same level~www.mtlnovel. com~ The more complex the blood vessels in the fairy blood, the more dissolving agents are needed. Many of these dissolving agents are more precious, and the most expensive one is the heart of the devil.

The more the dissolving agent for higher blood vessels, the higher the level of the devil's heart is required. For example, the dissolving agent for lower blood vessels needs to use the heart of lower demons, and the dissolving agent for medium blood vessels needs the heart of middle demons. And so on!

　　 The hearts of low-level demons are relatively cheap, but the hearts of middle- and high-level demons are much higher and are hard to find on the market. This is mainly related to their strength.

　　 "Fortunately, they are all low blood!"

　　 Li Changsheng murmured to himself, he had a test tube made of demon core fragments in his hand, which was transparent, hard, heat-resistant and corrosion-resistant.

　　 There was a green dissolving solution in this test tube. Without hesitation, Li Changsheng poured the dissolving agent into the black-red viscous liquid.

　　 Soon, under Li Changsheng's sight, the dissolving agent began to exert its effect, wrapping up part of the blood mark.

　　 Under the effect of the dissolving agent, the structure of these blood vein imprints began to collapse and dissolve, and finally turned into black sediments, which fell under the bucket.

　　 This process took more than ten minutes. When the change in front of me was over, the black and red viscous liquid was lost by half.

　　 Soon, Li Changsheng poured a green dissolving agent again, and finally extracted a bowl of blood with black shimmer, this is the so-called black dragon blood.