In the past three days, Li Changsheng has preliminarily perfected the missing few steps of the Book of Bloodline, and successfully purified the blood of the Solid Armor Earth Dragon, and successfully obtained the bloodline of the Brass Dragon.

The Brass Dragon bloodline is the same level as the Black Dragon bloodline, because the Solid Armor Earth Dragon contains the pure Brass Dragon bloodline, and it failed to purify it countless times during the period, and the number of successes is very small, resulting in Li Changsheng finally only obtaining a test tube of Brass Dragon bloodline.

With such a bit of brass dragon blood, even if it is absorbed by a goblin who does not have a bloodline, the brass dragon bloodline obtained will only reach the point of inferior quality.

From the point of view of the extraction rate, it is probably about 5%, but as long as he is proficient, Li Changsheng is confident that he will increase the extraction rate to the point of 10%, as for the higher extraction rate, unless the upper half of the Book of Bloodlines is made, it is almost impossible.

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

This time, Li Changsheng was ready to extract the bloodline of the black dragon.

Li Changsheng first cut open the heart of the Venom Wyvern, releasing a large amount of essence blood, and then put a certain amount of boiling grass powder into the bucket sprinkled with the blood of the Venom Wyvern.

The next moment, the three buckets of venom wyvern's blood began to boil, and a large amount of water vapor gushed out frantically, and if you sniffed carefully, you could hardly smell blood.

Boiling grass powder quickly evaporates water from the blood and does not destroy important components of the blood.

About ten minutes passed, and the blood of the three venom wyverns was no longer boiling, and under the miraculous effect of the boiling grass powder, the blood of the venom wyvern all coagulated into a large crimson blood clot, which was a manifestation of a large loss of water in the blood.

These blood clots can be called blood essences, and they are also the first step in purifying the blood of the black dragon, although there is only one word difference from the blood essence, but there is a clear difference between the two.

After completing the most untechnical first step roar, Li Changsheng put the coagulated blood essence into a specific container, and gradually stripped out the useless magazines from the blood, leaving only pure blood.

There has been a lot of research on the extraction of bloodlines in this world, and there are many means to gradually extract the impurities in the blood, but many people cherish their own brooms and keep them secret, and it is difficult to obtain more profound knowledge of purifying bloodlines.

According to the extraction rate of the Book of Bloodlines, this is undoubtedly the top-notch bloodline purification technology. It's a pity that Li Changsheng only got half of it, and he had to use the knowledge reserves of the Yuanling Academy to make up for the missing part as much as possible, which directly led to a significant drop in the extraction rate, but it was still in the top bloodline purification technology category.

That's the power of the Book of Bloodlines!

As time passed, Li Changsheng gradually put in some powders, potions, and items, and extracted the magazine in the blood essence step by step.

After about an hour, most of the blood essence of the original three buckets had disappeared, leaving only a small bucket of black-red thick liquid, and under the illumination of the light, wisps of black light could be faintly seen.

The basic bloodline purification methods have been processed, and the next step is the second half of the "Book of Bloodlines".

At this time, Li Changsheng took out a tube of special medicine, raised his head and drank it, this is a special secret recipe from the second half of the Book of Bloodline, the production process is not complicated, and it can make Li Changsheng's vision change dramatically.

The next moment, Li Changsheng's pupils suddenly changed, as if they had become smaller than the tip of a needle, and there was a faint special light.

Looking at the black-red viscous liquid, Li Changsheng's vision was magnified to the extreme, and the viscous liquid was constantly enlarged until he saw the mysterious chains.

Thousands of chains of blood are constantly intertwined and entwined, working together to build a large and complex texture that seems to be pregnant with great power.

This is the bloodline chain that belongs to the Venom Wyvern, and its bloodline structure is huge and complex, constructing complex bloodline imprints.

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 were relatively dim, and they couldn't even be combined into bloodline imprints.

Venom Wyvern has a total of seven different bloodline imprints, and to put it simply, the bloodlines of seven creatures can be extracted, including the bloodlines of the black dragon.

Among these seven different bloodline marks, Li Changsheng locked on the only bloodline mark that radiated brilliance.

Even if he just stared, Li Changsheng could feel a faint coercion, and the majestic dragon roar could be faintly heard in the spiritual level.

This is the blood mark of the black dragon!

In addition to the black dragon's bloodline, the remaining six bloodlines can be described as worthless, and Li Changsheng's next step is to extract the black dragon mark as completely as possible, so that he can obtain the true black dragon bloodline.

If you want to purify the bloodline of the black dragon, the easiest way is to remove all the six low-level bloodlines and mixed bloodline chains, and finally only the bloodline mark of the black dragon remains.

In the second half of the Book of Bloodlines, in addition to the special potions that allowed Li Changsheng's vision to continue to amplify, there were also several special dissolving agent formulas.

These several dissolving agent formulas can be made to dissolve different levels of bloodlines, some for low-level bloodlines, some for medium-high bloodlines, and even a special dissolving agent that can be used to isolate bloodlines at the same level.

The more complex the blood veins in the elf's blood, the more dissolving agents need to be used, and many of the materials of these dissolvers are more precious, and the most expensive of them is the demon's heart.

The more dissolving agents for the higher bloodlines, the more advanced the demon hearts will be, for example, the dissolving agent for the lower bloodlines needs to use the heart of the lower demon, the dissolver for the medium bloodline needs to use the heart of the medium demon, and so on!

Lower Demon Hearts are cheaper, but Mid and High Demon Hearts are much higher and are hard to find on the market, which is mainly related to their strength.

"It's good that they're all low-grade bloodlines!"

Li Changsheng muttered to himself, he had an extra test tube made of demon core fragments in his hand, which had the advantages of being transparent, hard, heat-resistant, and corrosion-resistant.

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

Soon, under Li Changsheng's gaze, the dissolving agent began to exert its effect, wrapping some of the bloodline imprints.

Under the effect of the dissolving agent, the structure of these blood imprints began to crumble, dissolve, and finally dissolve into black precipitates that fell under the bucket.

The process took more than ten minutes, and when the change in front of me was over, most of the black-red viscous liquid was gone.

Soon, Li Changsheng poured in a green dissolving agent again, and finally extracted a bowl of blood that emitted a black faint light, which was the so-called Black Dragon Bloodline.