Reborn into Naruto World with Tenseigan

Watching Raijin and the flashes of white lightning from time to time, his expression became a little solemn. “This…”

Asuma immediately asked, “Did you see anything specific?” Although he has a wealth of experience as an elite Jōnin, Asuma neither specialized in the Lightning Chakra Nature nor was very good at it, so his judgment is somewhat prone to error, a similar case applies to Shikamaru who is only a Genin and doesn’t have much experience either. Kakashi on the other hand has an exceptional mastery over the Lightning Style, therefore, he ought to have reached the correct guess.

And Kakashi did not disappoint Asuma as he nodded lightly, “Well he is practicing the Lightning Stimulation Technique to stimulate the body cells with Lightning Chakra in order to temporarily increase their cell activity, it’s just that…”

As he explained Kakashi’s brows arched into a frown and his expression became a little thoughtful.

Shikamaru looked at Kakashi’s expression then turned to look at Raijin in the distance doubtfully.

“Just what?” Asuma urged Kakashi.

Kakashi did not immediately answer, rather, he pondered for an observing Raijin, and muttered lightning, “It’s really strange, why would he take such a risk?”

Asuma also turned his attention to Raijin for a while then looked back at Kakashi, waiting for his explanation.

At this time, Kakashi recovered and began talking, “Using Lightning Chakra to stimulate body cells is a very risky behavior. Overstimulation or uncontrolled stimulation of cells can damage the body and lead to large-scale necrosis which is life-threatening. It takes years upon years for the body’s cells to slowly and steadily adapt to Lightning Chakra for this reason, I have always used the Localized Lightning Stimulation Technique to stimulate specific body parts for shorter durations, and that too in a very controlled manner… Raijin on the other hand is using the Complete Body Lightning Stimulation Technique and he is using it in an uncontrolled manner, which is overstimulation of the body’s Cells and it is highly dangerous.”

“Is that so?” muttered Asuma as his eyes widened and he thought to himself, ‘So, I didn’t think wrong… that guy is indeed doing something highly dangerous.’

Kakashi nodded, “Yes.” He pointed at the training ground in the distance, and explained, “Just look at him… all that lightning chakra zapping out of his body and charging up the surroundings, that’s the excessive lightning. To stimulate the cells and increase their activity, such uncontrolled excessive lightning Chakra is unnecessary. By overstimulating his cells, the cells in his body are probably becoming more and more necrotic and I wouldn’t be surprised if he were to collapse within a week or two if he continues in this manner.”

Asuma and Shikamaru are both intelligent people so they both quickly understood the implication of what Kakashi was trying to say. In short, under normal circumstances, no one would dare to use such intense Lightning Chakra on their body for stimulation of cells. For Raijin to go so far, it’s like walking on a tightrope and taking such a high risk that even a ninja of Kakashi’s level is a bit frightened.

‘What on Earth does he intend to do?’ thought Kakashi as he looked at Raijin. Although he hasn’t communicated with Raijin all that much, he still doesn’t take the other party for a fool. No fool would be able to master something as complex as Single Chakra Nature Transformation of Lightning Chakra in his opinion, therefore, he believes that Raijin ought to have considered the consequences of going as far as he is going with the Cell Stimulation. Despite that he is going so far, he must have something in mind.

…

At the Training Ground

Raijin suddenly stopped the cell stimulation and took deep breaths as his chest rose and fell.

The moment he stopped, the lightning streaks lingering around the training field sparked for a moment before disappearing.

Looking around, Raijin sighed, ‘Haah… Haah… I… I seem to have reached the limit, huh? It’s a bit too soon, isn’t it?’

Raijin shook his head as his breath recovered and he turned his head to glance in Kakashi, Asuma, and Shikamaru’s direction. He is naturally aware of Konoha ninjas keeping watch over him as he trains, but he doesn’t care. If the Konoha ninjas keeping watch over him can learn a thing or two by spying on him it would be great in his opinion. As the ‘Hokage,’ he would be very happy to see it happen.

“If it’s Kakashi, he should be able to figure out a thing or two quite easily,” murmured Raijin.

Kakashi is the most proficient user of Lightning Style in Konohagakure and Raijin believes that he is knowledgeable and talented enough to be able to grasp things after a while of observation. Owing to his reputation as the Copy Ninja and knowledge of Lightning Style, just by watching Single Chakra Nature Transformation of Lightning Chakra being implemented in the Darui vs Raijin fight, Kakashi managed to complete the same and ended up creating the Purple Lightning that he was supposed to create over a decade later after losing his Sharingan in the Fourth Great Shinobi War.

Therefore, Raijin is quite sure that Kakashi will definitely gain something from watching his training as such he didn’t plan on carrying it out in secret.

With that in mind, Raijin withdrew his gaze and examined himself.

At this time, aside from the paralyzing sensation that his body was experiencing, his chest felt like it was on fire, and his respiratory tract was damaged in many places. Just breathing caused pain in his heart and lungs. This undoubtedly meant that his respiratory system, especially his heart and lungs, had reached its limit. If he were to continue like this, it may lead to cardiac arrest or necrosis of bronchioles in the lungs.

Additionally, his limbs were weak, and some of the less strong muscle groups even had obvious tears and cracks in them.

Realizing how bad his physical condition had become, Raijin’s face underneath his mask showed annoyance, “Tch!“

He had anticipated the difficulty of mastering the ‘Lightning Chakra Mode’ from the beginning, but he never expected it to be this challenging. Even this Clone Body, specifically designed to handle the Lightning Chakra Nature and perfectly capable of emitting Chakra from all the Tenketsu in the body, found it very difficult to bear the burden of continuous Lightning stimulation.

Understanding the ins and outs of the matter, Raijin sighed, ‘It appears that mastering Lightning Chakra Mode would be a little more difficult than I had imagined.’

In fact, this is also completely natural. In the history of Kumogakure, the number of people who have actually mastered the Lightning Chakra Mode to the point of perfection is only two, the Sandaime Raikage and the Yondaime Raikage. Yes, only two ninjas so far… even Darui who is as talented as Sandaime Raikage has yet to completely and perfectly master the Lightning Chakra Mode.

Based on the records of wars and Kumogakure’s history that Raijin has obtained, the Shodaime Raikage had spent his entire life creating the Lightning Chakra Mode. The Nidaime Raikage spent his life improving the Lightning Chakra Mode he inherited from the Shodaime Raikage, and it wasn’t until Sandaime Raikage’s generation that the Lightning Chakra Mode was perfected.

Apart from these ninjas, no one has been able to perfectly master the Lightning Chakra Mode. Over the years, many have tried, but none have succeeded. Either they died trying because their bodies were unable to bear the burden of continuous exposure to the Lightning Chakra or they were eliminated by the ninjas of Kumogakure. Regardless, the number remains at two which may increase up to three once Darui perfectly master’s the Lightning Chakra Mode.

The fact that only two or maybe three ninjas are known for perfectly mastering the Lightning Chakra Mode shows just how difficult it actually is. Regardless of whether it’s Sandaime Raikage, Yondaime Raikage, or the future Godaime Raikage Darui… all of them, even with their incredibly strong bodies probably took years upon years of training and adaptation to master the Lightning Chakra Mode.

Due to the incredibly stringent requirements and high difficulty of mastering it, the status of the Lightning Chakra Mode in Kumogakure is akin to that of the Magnet Style in Sunagakure, the Dust Style in Iwagakure, and the Wood Style in Konohagakure.

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