Crab caught some more humans and started comparing their blood with demonic beasts and normal beasts.
Since he has captured a lot of Qi Refining cultivators, other humans become alert and start traveling in groups. Crab, who saw this, changed his location several times. He occasionally fought but managed to run away, as Qi Refining cultivators were not much of a threat to it.
However, he grew tired and scared, fearing what would happen if a strong Foundation Building human came. So, he slowed down his experiments with humans, but continued with the Demonic beast. Three months passed, but the results were still unsatisfactory.
He only learned a little and angrily muttered, "Who made this bloodline bullshit? I want to rip him apart and drink his blood."
Then, a thought struck him: "Wait, drink his blood? I can try that."
Soon, he caught a demonic crab and a mortal human. He made a small hole in the human's body, just enough to keep him alive, and started pouring the demonic beast's blood into it.
The crab shook its head in frustration and thought, "This process is terrible. 95% of the blood goes to waste." Despite the flaw, he let it continue this time and will think of something else for next time.
As the demonic blood entered the human's body, its cells started to fight back. The invader blood, filled with spiritual energy, was stronger than human blood and quickly started to replace it. Soon, the human died because the demonic blood destroyed several vital parts of his body and due to blood loss.
Crab thought maybe the human was too weak, so he caught a stronger Qi Refining human and repeated the process, this time using crocodile demonic beast blood.
The crab made a hole in the human's leg and another in the crocodile's stomach, then inserted the human leg into the crocodile's body.
Inside the crocodile, its blood sensed an invasion and began to attack the human blood emerging from the hole. After some time, the crocodile's blood started entering the human's body. Since the crocodile was dead and its cells were quickly dying, they attacked onto this new source of energy. As the crocodile blood merged with the human body, the human blood was gradually replaced, and the wound on the leg healed too.
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The human, a Qi Refining level 3 cultivator, stood there terrified, begging in his own language. He was in immense pain as the blood-changing process was slow and painful. Seeing the human's body weakening and needing nutrients, the crab gave him some raw meat lying around in the cave. Helplessly, the human ate the meat, unable to resist the demonic crab's.
When the human recovered, the crab removed his leg from the crocodile's body and made another hole to see what would happen. It observed that the blood emerging from the wound resembled demonic beast blood. The human, upon seeing another hole being made, screamed in agony, "Ahhh, fuck you, beast! Fuck you!" It also saw that human seem to be stronger than last time.
The crab ignored the human's cries and then split the human's body in half to search for the spiritual energy center, known as the dantian. It found that the dantian was functioning as usual, indicating that humans are not restricted by bloodline limits even if their blood is completely replaced. The crab wondered if this was due to the dantian.
It considered placing a dantian within its own body but realized it couldn't because the dantian was connected to numerous meridians and veins.
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The crab shifted to a new area, determined to continue his experiments. This time, he captures two demonic creatures of the same level: one a crab and the other a snake.
He dug a hole in the ground and poured the snake's blood in it. Then, he made another hole in the crab's body, allowing the snake's blood to mix with the crab's blood. The crab was kept alive, its mouth outside the hole so it couldn't drink the blood, only its body absorbing it through the hole.
The snake's blood continues to go into the crab's body.
Soon, the two bloodlines began to clash within the crab's body. The crab appeared weakened, its healing slowed. Sensing this, the crab provided the demonic crab with snake meat, telling it in the crab language, "Eat."
The demonic crab hesitantly consumed the meat. As it did, it began to recover, although its bloodline seemed slightly altered.
While the crab was now healing. He captured more demonic beasts and this time created a large, well-hidden cave. Inside, he placed Qi Refining humans and mortals in different sections.
Using the same method he employed on the crab, he repeated the process on the humans and mortals, forcing their bloodlines to mix and clash within their bodies.
The crab continued his ancient and unorthodox methods.
The crab observed that the mortal human died too quickly due to his weak healing abilities. Next, he proceeded with a new experiment: using the blood of a level 1 demonic beast on a level 6 Qi Refining cultivator.
As the process began, the demonic beast's blood overpowered the human's blood, gradually replacing it. The human was left in a half-dying state due to the hole in his body. Despite this, it was evident that human bloodlines could be changed relatively easily. It also seemed that humans could continue practicing their original methods even after their bloodline was altered.
Next, the crab checked on the demonic crab, which was now healed after the bloodline clash. He broke a part of the crab's body to examine its blood. Although the blood was not significantly different, it appeared weaker.
Satisfied, the crab captured more demonic beasts and humans and continued the experiment.