The core reason why ninjutsu requires hand seals is to manipulate the chakra attributes in the body to achieve efficient chakra usage.
However, Satoru never relied on this tedious process when performing ninjutsu.
This made him wonder if his attribute-less chakra could freely switch among the seven attributes without going through the intermediary link of hand seals?
If true, then his chakra would possess unparalleled flexibility and efficiency, far exceeding that of ordinary people.
Such an idea excited Satoru.
If his guess was correct, then he would have a power unlike anyone else. He would be able to adjust the nature of his chakra anytime during battles to deal with various situations.
Undoubtedly, this was a powerful advantage.
But why did this happen to him?
After all, logically speaking, there shouldn't be anyone without attributes in this world. Everyone should have at least one attribute to stimulate their chakra power.
It seemed like he had become an exception in this world, a unique existence without attributes.
Perhaps it was because of his reincarnation.
Satoru could only guess like this.
But could non-attributed chakra truly penetrate all ninjutsu, once this idea popped into his mind, it grew like wild grass and couldn't be restrained.
Satoru decided to immediately investigate this mystery. So, he began to peruse the Scroll of Seals.
Perhaps, through practice, he could find the answer.
The Rikugan shone with a unique light. Under its gaze, the words on the Scroll of Seals seemed to come alive and appear on the paper.
Satoru directed his attention to the Tajū Kage Bunshin no Jutsu and began to analyze its principles deeply.
"I understand." He whispered to himself, a glimmer of understanding appearing in his eyes.
It turned out that the Tajū Kage Bunshin no Jutsu involved summoning a large number of clones by evenly distributing one's chakra to the shadow clones, and each of these shadow clones was equivalent to an entity, and what they experienced would be transmitted back to the main body.
"Because performing this ninjutsu requires a large amount of chakra and extraordinary willpower, there are certain dangers to life when performing this ninjutsu, thus it is classified as forbidden ninjutsu." Satoru murmured after reading this.
Large chakra and extraordinary willpower? Didn't this describe himself?
He felt a wave of confidence in his heart.
He had the Ryumyaku functioning as a chakra reservoir to replenish his chakra anytime and anywhere, and he had been exposed to countless information through the Rikugan since he was a child, making his soul very strong.
Therefore, Satoru felt there was no problem in performing this ninjutsu.
Let's start with that first.
After making the decision, Satoru closed his eyes and began to channel chakra into his body.
The Rikugan quickly analyzed the principles of the shadow clones, and chakra began to flow.
"Tajū Kage Bunshin no Jutsu!"
In an instant, the entire room seemed to be enveloped in white smoke emanating from Satoru's body.
As the white smoke dissipated, figures identical to him began to appear one by one.
He watched as more and more figures surrounded him and couldn't help but feel a little happy.
Before long, the entire room was filled with figures of himself, crowding around like a chaotic carnival.
"Don't step on me!" A voice came from the crowd, slightly annoyed.
"Whose foot is being shoved into my mouth!"
"Go away, why do your feet still smell?"
"Isn't the smell of my feet the same as the smell of your feet?" A playful voice teased that they were all the same person.
"Too crowded!" Everyone complained.
Satoru stood in the middle of the crowd, observing the figures exactly like him running around the room.
Success!
For once, the Tajū Kage Bunshin no Jutsu was successfully activated.
His guess was confirmed.
Satoru was very pleased to know that he, with his attribute-less chakra, could actually freely manipulate chakra without relying on hand seals and could use his own will to activate all ninjutsu.
This ability seemed to have opened a new door for him, allowing his understanding of ninjutsu to reach unprecedented levels.
He smiled and dispelled the Tajū Kage Bunshin no Jutsu. In an instant, all the shadow clones turned into white smoke, disappearing into the room.
Feeling the sudden consumption of his chakra and a slight fatigue in his mind, Satoru knew that this was the residual effect of the Tajū Kage Bunshin no Jutsu.
But at this moment, his face was full of joy.
With the extraordinary combination of insight from the Rikugan and attribute-less chakra, he seemed to have eyes that could see everything. With just one glance, he could understand the formula of ninjutsu, and then he could easily use it at his fingertips.
However, Satoru was not satisfied with just this. This time, he shifted his focus to the Hiraishin no Jutsu on the scroll.
Because when he was in Konoha, he had a bold idea: Could he create a vacuum zone by closing off space around him?
Now, he felt that this idea could be realized with the help of the Hiraishin no Jutsu.
The essence of the Hiraishin no Jutsu lay in the mastery of space and time.
It left special marks at specific locations, and then the user could use these marks as anchor points in space and time to achieve instant location transfer.
Satoru knew that the Hiraishin no Jutsu and the instant movement of Blue had similar qualities, but compared to the two, the Hiraishin no Jutsu was clearly more advanced and versatile.
Ninja not only needed extraordinary spatial-temporal perception but also required precise chakra control.
Satoru gradually understood the true meaning of the marks of the Hiraishin no Jutsu.
Different from Blue, these marks were not simple position determinants, but they were like spatial portals; if two marks were set up, it would be like two spatial portals, and space would be formed between them, thus creating an invisible space-time channel, allowing the user to instantly traverse long distances.
Satoru's thoughts didn't stop there.
If the Hiraishin no Jutsu was the key to opening teleportation doors in marked space, then conversely, could this key be used to close open doors?
A bold idea emerged in Satoru's mind: If the spatial portal represented by the Flying Thunder God mark was completely closed here, and a Flying Thunder God mark was set up around it, wouldn't that mean this space could be completely isolated from the outside world, thus creating a vacuum zone?
Satoru's eyes gleamed, seeing the possibility of this idea becoming a reality.
Sparks of this backward thought ignited brightly in his mind.
But besides that, he still had a question in his heart.
Was his foot really smelly?