Naruto: Betrayed From The Start

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What is the principle of genjutsu?

Genjutsu works by infusing genjutsu Chakra into another person's body, allowing it to flow to their brain and affect it, causing the enemy to fall into genjutsu.

Essentially, it's about inputting or inducing the input of false information into the enemy's brain through genjutsu Chakra, thereby confusing their brain's perception and, in turn, confusing the physical perception transmitted from the brain.

The key here is the input and output of information.

The input of information allows the illusion to invade.

The output of information makes everything perceived by the person in the illusion seem real.

It can be said that most genjutsu, whether it's visual, tactile, or auditory genjutsu, works by manipulating the input and output of information.

The Dark Technique is no exception.

However, the Dark Technique is different from other genjutsu.

Other genjutsu deprive sight by inputting information into the brain, causing the brain to produce the information response of "not seeing."

The primary target is the brain.

The Dark Technique is not. Kenshi clearly sensed that the Dark Technique Chakra stayed in the eyes. It directly cut off the nerve pathways that transmitted all the light signals received by the eyes to the brain.

A physical cut-off.

Now, the two wandering ninjas' eyes are actually fine. They can see anything.

But because the signals from the eyes seeing objects can't reach the brain, the signals transmitted from their brains are a blank. Their vision is also a blank.

This is the principle of the Dark Technique. Compared to other genjutsu that disrupt the brain's perception, it's simple and brutal, but also very effective.

Kenshi compared the disruption of the brain's perception by genjutsu Chakra in ordinary people. This simple and brutal genjutsu, which directly cuts off the signal pathways of a certain organ, seemed even more difficult to dispel.

Thinking about this, Kenshi actively withdrew the Black Iron Chains from the bodies of the two ninjas who had been hit by the Dark Technique.

After their Chakra resumed flowing, he actively helped them disrupt the flow of Chakra in their bodies.

"No use!!!"

Despite anticipating it, Kenshi was still surprised by the power of the Dark Technique, or rather, he was amazed by the genius idea of the Second Hokage, Tobirama.

It's safe to say that he was truly a man who spent his life targeting the Uchiha clan.

Strictly speaking, the Dark Technique isn't actually genjutsu. It's a technique similar to nerve signal cut-off, using the special characteristics of genjutsu Chakra.

No wonder the people who are hit by the Dark Technique can still use various jutsu, even though they can't see.

So, that's the principle.

The Second Hokage was quite cunning. It's not actually genjutsu, yet he named it genjutsu - Dark Technique.

Enemies who don't understand would think that the people who have been hit by the Dark Technique have been hit by genjutsu and would try to dispel it using genjutsu techniques. They would find that they couldn't dispel it and would probably be very desperate.

Especially for the Uchiha clan, who are very good at dispelling genjutsu.

The Dark Technique is their nightmare.

Even the strongest Uchiha clan ninjas, if they don't understand the principle of the Dark Technique, won't be able to dispel it.

To dispel the Dark Technique, you just need to know the exact location where the Dark Technique Chakra is acting around the eyes. Then, you can accurately input Chakra to disrupt that part of the Dark Technique Chakra, and you can dispel the Dark Technique.

It sounds simple, but there aren't many people who can sense genjutsu Chakra so accurately. Especially, the Dark Technique Chakra is even more intangible and hidden, making it difficult to detect. This is why the Dark Technique has always been called genjutsu.

Actually... it can indeed be called genjutsu, just with a different principle than most genjutsu.

But the principle of the Dark Technique gave Kenshi inspiration.

Kenshi, with a thought, controlled the Dark Technique Chakra to envelop the brains of the two wandering ninjas.

In his sensing, the pathways that transmitted signals from the outside to the brain were very small, so small that Kenshi felt like he was seeing the smallest energy units of Chakra, like photons connected into beams of light, densely covering the brain.

Using the Dark Technique Chakra to precisely cut off these dense signal transmission pathways would be incredibly difficult.

But thankfully, Kenshi's absolute control over Chakra allowed him to do it.

With a thought, Kenshi used the technique of cutting off the eye signal transmission pathways with the Dark Technique, precisely cutting off all the signal pathways that inputted signals into the brain.

In an instant, the brains of the two wandering ninjas were as if they had been locked in a sphere. They couldn't receive signals from their sensory cells. They became like vegetable people. Their bodies, which had been struggling, instantly became quiet and motionless.

But soon, only a third of a second later, the two began to struggle violently again. They also shouted things like "Spare me" and so on.

"This is..."

Kenshi frowned. The Dark Technique Chakra that had imprisoned the brains of the two ninjas was broken through by the instinctive Chakra burst of the two.

Genjutsu Chakra, in order to invade and merge with other people's Chakra without being detected, is intangible and as soft as water. It can be easily broken through.

This is why people who are hit by genjutsu can dispel it as long as they can disrupt their own Chakra.

Kenshi had discovered a weakness in the Dark Technique.

Because it wasn't genjutsu, the Dark Technique Chakra forcefully cut off the two ninjas' brains from receiving all signals. Although their bodies entered a vegetative state, their brains were awake. They could also make some reactions based on their brain consciousness.

They had just controlled the Chakra in their brains and burst out, dispersing the Dark Technique Chakra, thus dispelling the Dark Technique in their brains.

But... the cost seemed a bit serious!

Looking at the two wandering ninjas, who had only struggled violently for a few seconds before foaming at the mouth, rolling their eyes, and finally becoming completely motionless.

Kenshi's brow relaxed, and he smiled slightly.

Although the two ninjas had dispelled the Dark Technique Chakra's signal blockade on their brains, their brains were a fragile place. Suddenly bursting with Chakra could also affect them.

This effect was not light.

Now, the two wandering ninjas had been turned into idiot vegetable people by their own Chakra burst.

"This jutsu still has some value."

Kenshi suddenly smirked. Especially for ninjas who are not skilled in Chakra control, once they are hit by the Dark Technique, which cuts off the brain's signal transmission, they will be like the two wandering ninjas now. Even if they dispel the Dark Technique, they will become idiot vegetable people because they can't control the Chakra burst well enough to damage their brains.

Even ninjas with fine Chakra control would probably need some time to carefully dispel the Dark Technique Chakra that envelops their brains.

And that time would be enough for Kenshi to kill his enemies.

It could be said that Kenshi had developed a trump card jutsu using the Dark Technique, a jutsu that could allow him to deliver a fatal blow at a critical moment.

So, the question is.

Why didn't the Second Hokage leave behind such a good Dark Technique derivative jutsu?

Kenshi's mind flashed with a doubt, then he frowned slightly. The original story didn't mention this kind of application of the Dark Technique, but that didn't mean it didn't exist. Maybe someone in Konoha knew about it?

"It's a good thing I have very keen Chakra Sensing and my consciousness, which is fused with Chakra, repels any invading alien Chakra."

"So... I don't have to worry too much."

"Then... what should I call it?"

Kenshi tilted his head slightly. Calling this brain-targeting jutsu the Dark Technique obviously wasn't appropriate.

"Since the effect is to turn people into vegetable people, I'll call it... genjutsu - Perception Deprivation Technique."

Kenshi chuckled. He also played a dirty trick, like the Second Hokage, and gave this jutsu a genjutsu name.

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