Naruto: Master of Yin chakra

Land of Fire.

Border.

"Be careful."

Satoru took a breath, and his right hand's Katana slashed down towards Itachi, while his left hand inadvertently formed a Genjutsu hand seal.

Itachi's Sharingan rotated rapidly. In his eyes, Satoru's speed at this moment was very slow, and the Katana's trajectory was like it were laid out in front of him. He could even perceive it without activating his Sharingan, completely unlike their previous sparring sessions.

"Could it be a trick?"

Suddenly.

He noticed one of Satoru's hands disappear from his sight, blocked by his body. Remembering Satoru's Proud means, his single-handed seal, he thought, "This isn't good."

His hand, which had originally been intended to block the attack with his Ninja sword, now wanted to quickly move away from Satoru.

Rip!

It was too late.

Even though his perception indicated that Satoru and his Ninja sword were still about ten centimetres away, his sleeve was suddenly torn.

It was as if Satoru's sword had extended invisibly.

Thump thump!

Retreating a few steps quickly, Uchiha Itachi frowned at his Katana.

"What exactly happened just now?

Did the blade extend?"

...

"What's wrong with Itachi?

That Satoru bastard's sword had already entered an area difficult to defend against, and he only then raised his sword to defend. How could he make such a basic mistake? It's not like him!" Anko Mitarashi, watching from behind, also frowned.

After two months of being together, she understood Itachi's strength very well. Such a mistake, let alone Itachi, even a Genin who graduated normally from the Ninja School wouldn't make such a mistake.

Itachi was bound to lose against Satoru, but he shouldn't lose like this, right?

Hayama pondered for a moment and said, "Did you see that hand he hid? He must have secretly cast Genjutsu, causing Itachi to fall for it."

Anko was stunned when she heard this, recalling Satoru's movements just now. She indeed hadn't seen his other hand.

Remembering his single-handed sealing technique and Genjutsu ability, she felt relieved. As long as it wasn't Itachi's mistake, she could accept it.

"What kind of Genjutsu is this? This Satoru guy is too good at hiding his abilities!"

These two months at the border, besides patrolling, they had been sparring and learning from each other to maintain their condition. Everyone was full of admiration for Satoru's Genjutsu.

They even once forbade Satoru from using that disgusting taste-based Genjutsu; it was simply outrageous.

This was the strongest Genjutsu Ninja she had ever seen.

"It's not hiding; it's that you all can't force him to go all out," Hayama said.

"..." Anko was speechless.

She knew that!

But knowing that the opponent is a Genjutsu Ninja and still being unable to break it is simply a disgrace to the Ninja profession.

...

Uchiha Itachi was Uchiha Itachi. After a brief period of thought, he also considered the hand Satoru had hidden.

Also, regarding Satoru's usual Genjutsu, the opponent's blade didn't extend; it appeared displaced in his eyes.

"His Genjutsu caused me to misjudge the shape of the sword."

Finally, he concluded.

Release!

Thinking of this, he immediately used the Genjutsu release method.

He then looked at Satoru, who was smiling and waiting for him to recover, and at the Katana in his hand.

Indeed.

Although the blade seemed to have changed little, in the eyes of the Sharingan, the Katana was now about ten centimetres longer than before.

What an insidious Genjutsu.

As a fellow Genjutsu Ninja, he knew how terrifying such a subtle Genjutsu could be for an enemy.

With normal Genjutsu, enemies can quickly realize irealisejutsu, and unless it's unbreakable, they can respond quickly.

But the kind of Genjutsu Satoru uses, which makes the enemy unaware of the Genjutsu, is truly terrifying.

Just like before, if Satoru hadn't held back, his arm would have been gone.

Itachi looked at the part of his arm where his sleeve was torn.

"Oh, you realised, realised? How is it, my new Genjutsu? I haven't been slacking off during these two months of patrolling, you know."

Satoru didn't see Itachi's surprised expression and felt a bit bored.

Being too smart isn't good; there's no fun at all.

He had wanted to see Itachi's shocked expression, and then for him to beg and plead.

"New Genjutsu?" Itachi asked.

In other words, this Genjutsu was created within these two months, which made him feel a bit inferior.

Everyone said he was a genius, but perhaps the person in front of him was the true genius?

Satoru nodded: "Genjutsu: Shape Transformation. It can change the enemy's perception of an object's shape. That is to say, the moment you fall for it, all shapes are defined by me.

However, the object's actual shape remains the same.

In other words, what changes is your perception,

Not the actual shape of the object.

So, with that said, do you have a countermeasure?

Come on, let me you're if you Arius!"

Looking at the man holding the sword and smiling, the three people, including Itachi, felt a sense of dread listening to his words.

Even knowing the information, responding wouldn't be easy.

They would have to dedicate a portion of their energy to constantly watch out for potential Genjutsu from the opponent.

Even if they knew they hadn't fallen for it, they wouldn't dare to be careless.

If he didn't tell them, the enemy would be miserable. If he did tell them, the enemy would be like they had an extra person, tying up some of their energy.

In short, knowing the information and not knowing the information both had an effect.

Unless,

The enemy was a robot, without consciousness.

Itachi began to form hand seals, and with a large exhalation, a giant fireball attacked Satoru.

This obscured the vision between the two, preventing the opponent's Genjutsu.

Then he pulled out a Kunai from his body, and a steel wire was pulled out from behind, wrapping around the back of the Kunai.

He launched them in different directions.

Whoosh whoosh!

"As expected of a genius, you quickly thought of a way to prevent falling for Genjutsu, but...

You've blocked my vision, but you've also blocked your own."

Satoru indicated that this was too naive. The Katana in his hand transformed into a small, palm-sized knife, which he put away.

Then he formed hand seals with both hands.

Earth Release: Earth Flow Divide.

He didn't need to see where he was going. This method only prevented his visual Genjutsu from being useful.

He emerged from underground, passing over the Great Fireball, and popped out in front of Itachi, making a funny face at him.

Whoosh whoosh whoosh!

However, what greeted him were Kunai from all directions.

Wrapped in steel wire, they attacked Satoru.

At the same time, Uchiha Itachi's Sharingan rotated, observing his every move.

He was ready to make adjustments at any time.

"Young people don't have martial ethics, ambushing an old man like me, who's seventeen."

Satoru faced these Kunai with a calm expression.

"Wind Release: Pressure Damage."

Whoosh whoosh whoosh!

The Kunai from all directions were immediately blocked by an invisible barrier and sent flying in all directions, centred,!

The Kunai stuck into trees, making dull thudding sounds.

Clap clap clap!

Satoru clapped: "That's enough for now. You did well; you've made progress recently."

Anko Mitarashi walked up and pointed at his face: "Hey, you're too sneaky! By blocking your eyes, Itachi's Genjutsu can't be used."

Satoru spread his hands: "If you're bad, practice more."

His annoying demeanour made Anko want to punch him, but knowing she couldn't win, she could only clench her fists and grit her teeth.

She wouldn't let him find an opportunity.

Itachi didn't know what he was thinking, silently collecting all the Ninja tools around him, little by little.