The Difficulty of Developing the Perfect Transformation Jutsu

To avoid drawing the attention of the ninjas manning the barrier, only real animals such as birds could pass through it unnoticed.

Birds in nature had no Chakra within them.

Therefore, the ninjas monitoring the Sensory Barrier would determine that the bird had not been transformed by a ninja or controlled by another ninja, and would simply ignore it.

Because if the bird had been transformed by a ninja or controlled by one, Chakra would definitely be present within it.

As long as Chakra existed, the barrier would inevitably detect it.

That was the Five Great Shinobi Villages' Sensory Barrier. Its ability to sense Chakra was terrifyingly powerful.

Almost no enemy ninja could breach it without a sound.

But once one possessed the Perfect Transformation Jutsu, everything became much easier.

A bird created through the Perfect Transformation Jutsu was a real bird, without the slightest trace of Chakra in its body.

When freely entering and leaving the Five Great Shinobi Villages, the ninjas monitoring the Sensory Barrier would not identify it as an enemy infiltration and be alerted.

This way, Kimura Takuya, once he mastered the Perfect Transformation Jutsu, could directly infiltrate every village and gather intelligence.

Moreover, transforming into a bird or something similar to approach enemy ninjas would not arouse their vigilance, making it even easier to collect useful intelligence.

Furthermore, birds could fly, which meant Kimura Takuya, with the Perfect Transformation Jutsu, would become a ninja capable of flight.

In the Naruto world, there were very few ninjas who could fly. You could count them on one hand.

At critical moments, being able to fly could save your life.

So in a sense, ninjas who could fly were born with an invincible advantage.

After all, when in doubt, they could simply fly away. Their enemies could only watch helplessly as they vanished into the distance.

They could even enter the sea and perfectly transform into fish, swimming through the deep ocean to evade pursuit.

The immense pressure of the deep sea would naturally prevent any enemy from approaching.

More importantly, whether perfectly transformed into a fish or a bird, they could not be sensed by Chakra-sensing ninjas because they had no Chakra.

Once they left the enemy's line of sight, it would be difficult for any ninja to catch them. It was practically the ultimate escape tool.

If used for assassination, the Perfect Transformation Jutsu was also a formidable weapon. Without Chakra, it was difficult for others to notice or guard against it.

It could be said that the Perfect Transformation Jutsu was not only useful for infiltration and intelligence gathering—it was also exceptional for assassination and escape.

And gathering intelligence, escaping, and assassination were all essential duties of Anbu ninjas.

The Perfect Transformation Jutsu was perfectly suited to Anbu ninjas.

"No wonder Kimura Takuya wanted to research and create the Perfect Transformation Jutsu. It really is a jutsu that suits an organization like the Anbu!"

Li Yao marveled inwardly.

"It would be a shame to let such a perfect jutsu stop here."

Li Yao's heart stirred, and he had already resolved to inherit Kimura Takuya's research and create the Perfect Transformation Jutsu.

This was the period between the First Shinobi World War and the Second Shinobi World War.

And in all likelihood, the Second Shinobi World War was not far off.

Li Yao did not know whether he would be sent to the battlefield.

But if he could create the Perfect Transformation Jutsu before then—

Then regardless of whether he was sent to the battlefield, should he ever be surrounded and forced to flee for his life, the Perfect Transformation Jutsu would be his safest means of escape.

Mastering the Perfect Transformation Jutsu would greatly improve his chances of survival.

"But such a powerful jutsu probably won't be easy to create, right?"

Li Yao frowned slightly as he guessed, then continued flipping through the notes with some unease.

Just as he had expected, the idea behind the Perfect Transformation Jutsu was excellent, but realizing it was extremely difficult.

To elevate the Transformation Jutsu from a visually deceptive technique into a Perfect Transformation Jutsu capable of material conversion involved far too many challenges.

Kimura Takuya had first begun researching material conversion through the Substitution Technique.

As everyone knew, the Substitution Technique was actually just a type of Clone Technique. Like Water Clones and Sand Clones, it was not Space-Time Ninjutsu that could switch positions with a piece of wood.

Otherwise, Sasuke's exclusive Six Tomoe Rinnegan ability, Amenotejikara, would be far too cheap.

In truth, the so-called Substitution Technique was merely a combat tactic where one released a clone at the right moment to draw the enemy's attention while hiding and waiting for an opportunity. It was not a true ninjutsu.

What Kimura Takuya actually wanted to study was the principle behind Clone Techniques performed using wood.

The Clone Technique among the Three Jutsu and the wood clone technique used in the Substitution Technique were different—or rather, they were techniques on entirely different levels.

The Clone Technique among the Three Jutsu was essentially a series of phantom clones of oneself. To some extent, the Clone Technique was also an application of the Transformation Jutsu; it simply transformed into one's own appearance.

Therefore, the Clone Technique among the Three Jutsu was merely a form created from Chakra. It had no weight and naturally no attacking power.

It could not even move vigorously. It could only make a few simple movements in place, and the slightest strong impact would shatter it like a towering sand dune at a touch.

So how could a Clone Technique move like a normal person while possessing a certain sense of impact and attacking power?

The answer was to perform the Transformation Jutsu with wood as the core, allowing the phantom clone to reside within the wood. This gave the illusory clone the stability of wood, making it not only harder to destroy, but also allowing it, through its Chakra connection, to possess the weight of wood.

This way, when the clone fought and collided with an enemy, the sensation of physical impact would feel more real, making it easier to deceive people.

Kimura Takuya's research into wood clones was meant to determine how wood, through Chakra, allowed a phantom clone to possess the solid impact of a real person, and what exactly connected the two.

After researching for some time, Kimura Takuya figured out the principle of wood clones.

Chakra was both energy and a special energy channel. It could transmit the "weight" of wood to a phantom clone, then use the phantom clone as the subject and grant it weight.

This did not involve material conversion, but it was already a faint beginning.

"Chakra can grant some of a material's properties to Chakra."

Following this line of thought, Kimura Takuya replaced the wood with a living bird and performed the Transformation Jutsu with the bird as the core.

If he could transform the bird's weight into the phantom clone's weight—

Then could he go a step further and transmit information such as the bird's flesh and blood cells to the phantom clone, allowing it to possess flesh and blood cells as well and become a normal living person?

The answer was clearly yes, at least in theory.

But in the first stage, Kimura Takuya failed when using a bird to perform the Clone Technique. Even using a dead bird did not work.

Unlike stable wood, whether the bird was alive or dead, Chakra could not transmit its "weight" to the phantom clone and form a stable bird clone.

Without breaking through this step, material conversion could not even be discussed.

But this step was far too difficult.

More than half the notes recorded Kimura Takuya's various experiments on this issue.

Even so, when Li Yao flipped to the end, he still did not see Kimura Takuya break through this crucial step.

But he had not come away empty-handed.

Through his research and experiments, Kimura had arrived at a fairly credible conjecture.

The reason Chakra could not transmit the bird's weight to the phantom clone was that birds, like humans, possessed Physical Energy and Spiritual Energy within their bodies.

And because Chakra itself was formed through the fusion of Physical Energy and Spiritual Energy—

When his Chakra entered the bird's body, it was likewise subtly affected by those two energies.

It could not transmit the bird's weight as steadily as it could transmit the weight of wood.

To steadily transmit a bird's weight, Kimura Takuya guessed that the bird's Physical Energy and Spiritual Energy would need to remain in a stable state.

But that was impossible.

Physical Energy and Spiritual Energy changed every moment, like the water of a flowing waterfall. A waterfall might appear still, but the water in it one moment was not the same as the water the next. It was constantly flowing and changing.

So it was impossible to stabilize the bird's Physical Energy and Spiritual Energy.

If it was impossible to stabilize the bird's Physical Energy and Spiritual Energy—

Then if his own Chakra could remain synchronized with the bird's Physical Energy and Spiritual Energy at every moment, it might theoretically be possible to steadily transmit the bird's weight to the phantom clone.

But that was equally impossible.

Not only could Kimura Takuya not do it, it would be difficult for anyone else to do so.

People could not even precisely sense their own Physical Energy and Spiritual Energy, much less the changes in a bird's Physical Energy and Spiritual Energy.

"So difficult."

Seeing this, Li Yao subconsciously shook his head. Putting himself in Kimura Takuya's place, he could not do it either. He could only precisely sense his own Spiritual Energy and its changes; when it came to what was inside a bird, he was helpless.

He continued reading.

After failing at this step, Kimura did not give up. He changed his approach.