Cell Activation Forbidden Technique

Hyuuga Nen sat on the floor of his room. He activated his Byakugan, raised his arm, and fixed his gaze intently on his bicep. The bulging veins around the corners of his eyes betrayed the strain he was under.

Hyuuga Nen's perspective delved deep into his body, and he made constant adjustments as he went. Finally, he saw the muscle cells within his bicep.

Among the surface muscle cells of his bicep, a small section in the middle was stronger than the rest. This was the result of Hyuuga Nen reinforcing them with chakra.

At that moment, Hyuuga Nen felt his eyes grow dry. He deactivated his Byakugan and went to the mirror. Looking at his reflection, he saw that bloodshot veins had appeared in his eyes.

It seems that observing the cells inside my body through the Byakugan puts a great deal of pressure on my eyes, Hyuuga Nen thought while rubbing them.

But can other members of the Hyuga Clan also see their own internal cells through the Byakugan? I don't recall ever hearing of such a thing. If I am the only one who is special, what could be the reason?

Is it due to my talent, the influence of the Seal of Resilience, or perhaps both?

Hyuuga Nen sat down, closed his eyes, and performed a bicep curl, carefully sensing the changes in his muscles during the movement.

"As expected, the muscle strength in my bicep has become unbalanced. This attempt has failed," Hyuuga Nen sighed.

A year after obtaining the training methods for the Gentle Fist, Hyuuga Nen had already mastered the Eight Trigrams Sixty-Four Palms.

After initially mastering the Gentle Fist, Hyuuga Nen had secretly gone to experiment on bandits. He discovered that he could deliver the effects of the Gentle Fist through the style of a Strong Fist.

"It seems Kuromaru was right. My Gentle Fist chakra is more unique than that of an average member of the Hyuga Clan. However, executing the Gentle Fist in the style of a Strong Fist puts even greater pressure on my body."

Although the Gentle Fist was superior to the Strong Fist in terms of accuracy and stealth, it could not compare in power, speed, or range. Hyuuga Nen decided to keep the Strong Fist as his primary style, though this placed higher demands on the strength of his body and meridians.

Of course, Hyuuga Nen could slow down the burst of chakra while performing the Strong Fist, but if the speed of the chakra could not keep up with the speed of his punches, it would simply be a regular Strong Fist.

To address this, Hyuuga Nen conceived a method of using chakra to reinforce his body so that he could unleash the Strong Fist to his heart's content.

"My current theoretical knowledge is insufficient to support this method of physical reinforcement. To meet my goals, I need more advanced medical ninjutsu knowledge, as well as a large amount of experimental material, equipment, and money. But right now, I lack all of these."

"The human body has all kinds of cells. Determining what intensity of chakra is needed to stimulate each type, and how long that stimulation should last—all of this requires individual experimentation."

"In the ninja world today, the only person who could meet these requirements is likely Tsunade. Yakushi Kabuto and Shennong might count as half."

As he thought, Hyuuga Nen condensed a Chakra Scalpel. He held it up before his eyes and whispered:

"Rather than calling this a Chakra Scalpel, it would be more accurate to call it a chakra kitchen knife."

Hyuuga Nen did not have the formal training for the Chakra Scalpel; this was something he had figured out on his own. It was certainly impossible to use for precise surgery, but it should be enough to cut meat.

Hyuuga Nen carefully controlled the Chakra Scalpel, cutting away the muscle tissue along with the reinforced cells.

"Hiss, that's too much!" Hyuuga Nen winced in pain. He then used the Mystical Palm Technique to treat the area he had just excised.

"What I need now is a comprehensive, permanent reinforcement of my body. If I approach it cell by cell, given my current conditions, I will only end up unbalancing my body and eventually ruining it."

"If I try to explore this through medical ninjutsu, it might take a very long time. I wonder if Konoha has the data I need? Should I go steal a copy?" This thought crossed Hyuuga Nen's mind.

"No, that's too dangerous. Once discovered, my life would be forfeit. I wonder if there is a way to take a shortcut?"

Hyuuga Nen frowned and spoke softly.

His gaze wandered aimlessly around the room until he saw Taro sleeping.

With Taro's breathing, its belly rose and fell rhythmically. Hyuuga Nen kept his mouth shut, staring intently at Taro's stomach, seemingly deep in thought.

"Got it! Perhaps this method is worth a try." Hyuuga Nen took out the basic medical ninjutsu scrolls and began to read softly.

"The human body has eight systems: the respiratory, circulatory, digestive, musculoskeletal, nervous, endocrine, and so on. These eight systems constrain and connect with one another, collectively carrying out all the life activities of the human body."

"My previous approach of simply reinforcing cells was wrong. The requirements were too high. I should perhaps change my perspective and start with the eight major systems of the human body!"

"The first system the body uses to exchange with the outside world is the respiratory system. I should use chakra to simulate the respiratory system, mixing low-intensity chakra into the inhaled oxygen, allowing the chakra to participate in the work of the respiratory system."

In this way, over a long period, Hyuuga Nen could naturally complete the reinforcement of his body. Furthermore, the body has a dynamic regulatory function, which would prevent any imbalances from occurring.

The more Hyuuga Nen thought about it, the more excited he became. He tossed the scroll aside and immediately began his experiment.

He activated his Byakugan and controlled his chakra, allowing it to participate in the work of his respiratory system. Throughout the process, he kept his Byakugan active to observe his own body.

Half an hour later, Hyuuga Nen stopped. "The theory should be sound, but this kind of training is quite exhausting. It's unrealistic to maintain it for long periods. If only I could automate the training."

"Perhaps I could achieve this goal through sealing techniques."

At this moment, Hyuuga Nen thought of the Four Symbols Seal. This sealing technique could lock away evil forces through the circulation of the four symbols.

"Perhaps I could carve this sealing technique into the primary organs involved in the respiratory system, circulating a portion of the extracted chakra within the respiratory system. This would achieve the effect of automatic training, and it could even be combined with the Seal of Resilience to reach an even more perfect state."

Although Hyuuga Nen thought this, he did not proceed. After all, such a method still carried risks, and he had not yet fully mastered the Seal of Resilience, so he set the idea of automatic training aside for now.

Over the next few days, Hyuuga Nen tested his idea further and found no issues.

"The effects aren't visible yet. To reach the point of true reinforcement, it will likely take years."

"I never expected to develop a forbidden technique so soon!" Hyuuga Nen was somewhat excited. He felt this forbidden technique might influence his entire life, so he took it very seriously and decided to give it a name.

"First, in terms of difficulty, this forbidden technique is undoubtedly S-rank, even in my improved version."

Moreover, this version could only be practiced by members of the Hyuga Clan. First, practicing this ninjutsu required extremely high chakra control, as well as the ability to control the flow of chakra throughout the body. Only members of the Hyuga Clan could emit chakra through all the tenketsu in their bodies.

Others, even with high chakra control, could only contain it within the range of their meridians; they could not control the large-scale flow of chakra throughout the body.

If it were just a matter of reinforcing cells, Hyuuga Nen doubted anyone else could complete this forbidden technique.

"My goal in developing this forbidden technique is to reinforce my cells, so the name must contain the word 'cell'."

At this moment, Hyuuga Nen thought of Shennong and recalled that he had a forbidden technique for cell activation. "In that case, I will call this forbidden technique the Cell Activation Forbidden Technique."

"S-rank ninjutsu, Cell Activation Forbidden Technique!" Hyuuga Nen stood up and said excitedly. He stretched, and the fatigue of the past few days vanished due to his excitement.

"My vacation is almost over. It's time to report back to Master Yuichiro."

Hyuuga Nen said this, but judging by the expression on his face, one could tell that his mind was currently anywhere but there.