Ten thousand I am across the heavens

The killing techniques used by the four legions in the underground base weren't inherently difficult to understand. It's just that some were extremely complex, particularly achieving the same effect through methods outside the legion's structure—a complex undertaking that would be quite troublesome even for immortals.

However, it was precisely this inability to imitate the principle despite knowing it, and the fact that even though he had tried his best to weaken the eldest son with his killing move, his efficiency was still not as high as that of a group of mortals, that made Old Ancestor Xuehu extremely annoyed.

Immortals have always been beings who surpass mortals in every aspect. Theoretically, they shouldn't have any weaknesses. But everything before us seems to prove that when faced with a sudden problem, the courage and wisdom displayed by a large group of people coming together can be more effective in dealing with and solving the problem than a single, powerful individual.

He Cheng personally led the four legions, repeatedly using flight formations to get close to the eldest son's body and launch slicing attacks. Their goal was not only to effectively damage the eldest son and delay his growth, but also to bring back enough of his flesh and blood. This was necessary for both research and the manufacture of mechs and other products, which also required the eldest son's flesh and blood. Cloning was ultimately not as convenient as directly plundering the eldest son's own flesh and blood.

This gave him a deeper understanding of this creature. A large number of similar photos and images were sent back to headquarters. The General Staff analyzed these materials one by one, attempting to find the eldest son's weaknesses, and they actually discovered some clues.

During his strategic respite, He Cheng received a telegram from the rear. The telegram claimed that a potential weakness of his eldest son had been found.

"The firstborn species has an extremely strong ability to adapt to the natural environment. Even on planets with extremely harsh climates and abnormal natural environments, they can adapt to the planet's environment and modify it to make it suitable for life."

However, this adaptation is not instantaneous; the eldest son is so large that most harsh environments are insufficient to kill him instantly. Only after enduring the damage of harsh environments can the eldest son gradually evolve the ability to defend against such damage.

In other words, the eldest son lacks the ability to defend against this type of harm upon first exposure. Furthermore, his ability to defend against harm highly relies on his superior perception. Tests show that while the eldest son's own flesh and blood, after separating from his body, instinctively adapts without purpose, when physically present, he makes comprehensive judgments based on the external environment. He can then use his intelligence to promptly stop any potentially adverse evolutionary paths.

He Cheng only fully understood this after some time of contemplation. Not all evolutions aimed at mitigating damage are beneficial. Life is ultimately limited by the laws of physics and cannot achieve perfection in every aspect. Developing structures like bony plates and scales to enhance defense is certainly a significant boost, but such hardened structures on an organism's body inevitably reduce its agility. The eldest son can control his vision; even under strong attacks, theoretically, hardening his body into a solid shell is the best way to defend. However, this doesn't mean such evolution is without drawbacks. Developing a hard shell also means his body is confined, drastically reducing his flexibility. He becomes an easy target, and even with the strongest defense, it will eventually be completely destroyed.

Therefore, the eldest son's flesh and blood, without separating from itself, will not indefinitely increase its own defenses or adapt to attacks. Instead, it will moderately adjust its structure to generate organs that can mitigate attacks to a certain extent. However, it must ensure that it has sufficient flexibility and evolutionary potential so that it can adapt to attacks of completely different types in the future.

As long as the flesh and blood are still connected to the eldest son's body, there will be no situation where, in order to defend against cutting attacks, he constructs his cells into the form of a slime, only to be blown up by an explosive attack and suffer massive damage.

"I know everyone is wondering. How can we take advantage of the eldest son's ability to regulate his own evolutionary direction through his own reason? Actually, it's quite simple. What we need to take advantage of is not the eldest son's regulation of his own evolutionary direction. As beings with superior intelligence, we are not at an advantage in terms of strategy. It is almost impossible to rely on wisdom, fabricate lies, or exploit the eldest son's weaknesses."

What we really need to utilize are the eldest son's cells. Once deprived of the body's control, they evolve without limit based on the damage they suffer. If we can briefly sever the connection between these cells and the eldest son himself, we can theoretically inflict massive damage on them quickly, forcing them to evolve in the direction we desire.

This plan could be fatal for the eldest son. Based on this characteristic, the General Staff formulated an operational plan. We, on the other hand, need to find a way to be responsible for its implementation.

The first step is to temporarily paralyze the eldest son's body. Compared to completely destroying his body, paralyzing a portion of his body with medication is not much more difficult, and more importantly, the eldest son adapts to paralysis more slowly than to injury. This buys us more time to implement the second phase of the plan. The biological research institute is currently working hard to develop new anesthetic drugs to meet our needs for the next operation. After all, we have a large number of the eldest son's cells stored. With sufficient experimental materials, we believe that a drug specifically effective against the eldest son will be developed soon.

Once most of the eldest son's cells are paralyzed, we will proceed to the second phase of our plan: to force the eldest son's cells to undergo specific adaptations, shaping them into the special state we require. As you all know, our ultimate weapon for the eldest son is the snowstorm, a blizzard combining the power of the entire Northern Plains. Therefore, the primary objective of our attack is to reduce the eldest son's cold resistance.

The General Staff has not yet finalized the details of the plan and needs to discuss it with everyone. My idea is to use fire attacks to force the eldest son's cells to evolve in a special way to adapt to burning, developing cellular structures suitable for resistance to combustion. They might be particularly vulnerable to freezing. Of course, this is just one idea and may not be suitable. If there are other attack methods to force the eldest son to adapt, please feel free to suggest them. The General Staff will cooperate, along with the biological research institute in the rear, to verify the feasibility of our plan. The group quickly grasped the principle behind the plan and began discussing possible solutions, swiftly rejecting the fire-then-ice approach. While the contrast between fire and ice might seem overwhelming for the eldest son, the evolutionary paths required for high and low temperature tolerance are actually quite similar. For humans, dealing with low temperatures necessitates wearing more layers, while dealing with high temperatures requires lighter clothing. However, this is because summer temperatures are far from life-threatening. In the face of truly intense flames, protection requires heavy protective clothing. In comparison, this heavy fireproof gear isn't much thinner than a thick cotton coat. Furthermore, in winter, its warmth retention wouldn't be significantly worse, and might even surpass that of ordinary winter clothing.

If the fire attack were carried out while the eldest son was paralyzed, it's highly likely that a heat-insulating layer would form on his skin. This would actually reduce the lethality of the subsequent ultra-low temperatures. The biological research institute behind the lines reached a similar conclusion after burning the eldest son's cells. Without brain control, the eldest son's flesh and blood, after being burned, would form a thick heat-insulating layer on its surface. This unique structure is highly resistant to low temperatures, preventing them from effectively killing the eldest son.

However, this also provides the biological research institute with a feasible research direction: if it is external high temperature, it is indeed only suitable to protect against it by generating a heat shield layer similar to a fireproof suit on the body surface.

But what if the high temperature is internal? It's like how you lower your body temperature after strenuous exercise. Wearing a thick, heavy coat in that situation would be suicidal.

The physiological structure of many mammals already provides the answer. They lower their body temperature as quickly as possible through sweating and other methods. Humans have even degenerated for this purpose, losing most of their body hair. This means their ability to withstand cold has been greatly reduced. And this is precisely the special effect that the underground base needs to kill the eldest son.

The eldest son is much larger. The biggest problem with ultra-low temperatures is that they can only freeze the surface of the body in a short time. They can't freeze deeper inside the body, giving the eldest son more time to adapt.

However, the eldest son's enormous size also presents a problem: heat dissipation. Excessive internal heat is a nuisance. If someone were to exacerbate this by releasing even more heat within the eldest son, he would have to find a way to cool down. Without a brain to guide him, the simplest and most direct solution would be to modify his body, creating an internal heat dissipation system, much like a mechanical heat sink. This system could consist of numerous layers of highly conductive heat sinks on his body surface, circulating through the body with a flowing fluid to dissipate the heat. During cellular evolution, cells would also evolve to conduct heat more efficiently, facilitating the release of the massive internal heat and preventing the body's physiological structures from burning out in extremely high temperatures.

After testing with large quantities of Firstborn flesh and blood, the feasibility of this plan was verified. In tests using a massive mass of Firstborn flesh and blood weighing tens of thousands of tons, the Firstborn's surface developed a unique dandelion-like structure. These structures were filled with blood vessels and thermally conductive fibers, which could efficiently conduct excess heat away from the body, maintaining a relatively normal body temperature. Under these conditions, if a sudden drop to extremely low temperatures occurred, the cold would rapidly spread along these blood vessels and thermally conductive fibers into the flesh and blood, freezing at a rate more than 10 times faster than the control group made from Firstborn flesh and blood that had not undergone any additional stimulation. This meant that the lethality of a super snowstorm for the Firstborn would increase tenfold.

After the general battle plan was finalized, the next step was to find a way to inject sufficient high temperatures into the Firstborn's body during the decisive battle. This is where the Eighth Burning Legion's role becomes crucial. To create such high temperatures within the enemy's body, and to make them so extreme that even the Firstborn would struggle to adapt, necessitates altering its physiological structure. The energy required is enormous. This energy necessitates an underground base, the depletion of all reactors, and the utilization of almost all of its energy storage devices to enable the Burning Legion to generate enough heat within the Firstborn's body.

Even if an eighth-level immortal were to exert their full power, the heat they could generate would be a drop in the ocean compared to the colossal size of the eldest son. Perhaps only the combined reserve energy prepared by an entire civilization could inflict a truly fatal burn on something of the eldest son's caliber.

If other legions wanted to utilize such a massive amount of energy, they would have to withstand the immense load brought about by the enormous power output. Just as electrical appliances will burn out if their power exceeds their rated capacity by too much, this is especially true for humans.

Fortunately, the Eighth Burning Legion is a rather unique legion among many. In the previous bloody battles, they mastered a unique application of their war-killing technique—the effect they call the Blessing of Eternal Radiance—which continuously keeps the legion at its most powerful moment in history. While this consumes a massive amount of energy, it also means that the legion's output power can reach a level unimaginable to normal legions during this period. Especially after fighting alongside Qin Baisheng, the Eighth Legion intentionally or unintentionally requested numerous buffs from him. With the strength of a seventh-tier top-level immortal, the buffs applied to the legion further boosted their peak strength, and by a significant margin. This allows them to unleash the Blessing of Eternal Radiance with terrifying combat power, and their physical attributes are sufficient to withstand the extremely exaggerated energy output.

The only problem now is how to release this enormous energy into the eldest son's body. The current commander of the Eighth Legion offered the simplest and most brutal solution: he would take the legion and reserves to hide the energy source and directly pierce through the eldest son's body, entering his body.

[To be continued]

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