Achieving "Kidney Destroyer"

Uchiha Kurohane had already conceived a method to break the encirclement while listening to the lecture at the academy.

He could not stand still and wait for the enemies to close in; instead, he had to charge at one of them and take him out first.

Uchiha Kurohane gripped a large Shuriken of Wind and charged toward Pumpkin Head.

He dodged the kunai thrust at him by shifting his body to the side and swung the Shuriken of Wind toward his kidney.

Slash!

The tip of the Shuriken of Wind pierced deep into Pumpkin Head's waist, and blood splattered instantly.

Kurohane Style Taijutsu—Kidney Strike!

This was a taijutsu style Uchiha Kurohane had created himself, inspired by the Gentle Fist's use of chakra to attack internal organs.

He felt that the Gentle Fist's method of using chakra to attack internal organs was incredibly weak.

For instance, Neji had struck Naruto sixty-four times, yet Naruto's body remained completely unscathed.

It would be far more effective to stab Naruto's internal organs sixty-four times with a kunai.

Uchiha Kurohane believed in putting theory into practice, so he developed a unique taijutsu style centered on stabbing enemies' internal organs with a kunai.

Since his opponents were his comrades in Konoha, killing them would cause trouble, so Uchiha Kurohane avoided vital organs like the heart or brain and targeted only the kidneys.

A kidney injury would not be life-threatening, and since humans have two kidneys, losing one would not have much of an impact.

This was Uchiha Kurohane's mercy toward his comrades.

It was the mercy of justice!

"Ah! My kidney!"

Pumpkin Head let out a miserable shriek, clutched his waist with both hands, and collapsed in agony.

Kidney Strike combo count: two!

Watermelon Head was a professionally trained genin; seeing his teammate fall, he neither panicked nor hesitated. He immediately used the Body Flicker Technique to flash behind Uchiha Kurohane and thrust his kunai toward Kurohane's back.

"Got you!"

Seeing the kunai about to pierce Uchiha Kurohane's body, he shouted in wild joy.

But in the next instant, Uchiha Kurohane suddenly transformed into a crow.

Watermelon Head's kunai struck the crow instead.

He stood frozen, stunned by the sight before him.

"What's going on? How did he suddenly turn into a crow?"

Just as Watermelon Head was bewildered, Uchiha Kurohane flashed behind him and swung the Shuriken of Wind toward his waist.

Crack!

The Shuriken of Wind pierced deep into his waist before being pulled out.

Blood sprayed out like a fountain.

"Ah! My kidney!"

Watermelon Head let out a miserable shriek and also collapsed, clutching his waist.

Kidney Strike combo count: three!

Winter Melon Head shouted in anger.

"Is that the Substitution Jutsu? Very impressive, it was so fast I couldn't see any flaws! Too bad I know how to break it!"

He waved his hand and threw a rope net at Uchiha Kurohane, ensnaring his body.

"Haha, now you can't use the Substitution Jutsu!"

The Substitution Jutsu in the ninja world did not involve instantly swapping positions with a distant object; rather, it involved throwing a log or a dummy to distract the enemy's line of sight while the user moved rapidly to a distance.

This was the reason why no one used the Substitution Jutsu in the later stages of the ninja world.

The Substitution Jutsu could only deceive rookies; it was meaningless against experts.

On the other hand, the Body Flicker Technique operated on a similar principle; the caster did not teleport to a distant location but simply ran there at high speed.

Ninjutsu that could instantly swap positions were called Space-Time Ninjutsu, such as the Flying Thunder God, which were high-level techniques that required special talent to master.

By trapping an enemy in a rope net, one could restrict their movement, preventing them from using the Substitution Jutsu or the Body Flicker Technique.

Winter Melon Head believed that an academy student could not possibly have mastered Space-Time Ninjutsu, so he assumed he had already won.

He laughed wildly as he thrust his kunai toward Uchiha Kurohane's waist, intending to pay him back in kind.

Uchiha Kurohane did not know the cooldown time for the automatic activation of the Yatagarasu substitution, so he did not take any risks and actively performed the hand seal to trigger the replacement ability.

This was not a complex ninjutsu; it only required a single hand seal to activate.

Just before Winter Melon Head's kunai could pierce Uchiha Kurohane's waist, with a poof, Uchiha Kurohane swapped positions with a crow flying behind Winter Melon Head.

Winter Melon Head was left dumbfounded and terrified as he saw Uchiha Kurohane suddenly turn into a crow.

"How is this possible? He was already trapped by the rope net; he shouldn't be able to use the Substitution Jutsu!"

"What kind of ninjutsu is he even using?"

While Winter Melon Head was lost in confusion, Uchiha Kurohane dashed behind him and slashed his large shuriken into his lower back.

Crack!

"Ah! My kidneys!"

Winter Melon Head's kidneys were pierced, blood spraying everywhere as he clutched his waist and collapsed to the ground.

Kidney Combo: Four!

In the blink of an eye, Uchiha Kurohane had easily taken down three genin.

Although the battle had been satisfying, he hadn't triggered any achievements, which left him feeling quite dissatisfied.

These genin were capable of using ninja tool scrolls to launch eight hundred shuriken; their skill level wasn't exactly weak, so why was there no achievement for defeating them?

Was it simply because they didn't have names?

Uchiha Kurohane felt indignant. After thinking for a moment, he hit upon a possibility.

He immediately tossed the large shuriken in his hand toward the other side of the lower back of the Winter Melon Head lying at his feet.

Crack!

He slashed his other kidney as well.

Kidney Combo: Five!

[Kyaa~ Host has destroyed five kidneys in a row, achieving the title "Kidney Destroyer" and obtaining the entry "Shuriken Genius B+."]

(Shuriken Genius B+: Host gains the shuriken techniques of Shuriken Genius Pumpkin Head, including the skills for throwing shuriken, giant shuriken, kunai, and other ninja tools. This also includes the Shuriken Shadow Clone Jutsu and the ability to release shuriken barrages using ninja tool scrolls.)

(The Shuriken Shadow Clone Jutsu is also known by Kosuke, and the Third Hokage taught it to him; it has a basis in either the anime or the manga, so don't think it's too outrageous.)

Uchiha Kurohane's hypothesis was proven correct.

The achievements in this system were unconventional and required a wild imagination to trigger.

The reward perfectly compensated for Uchiha Kurohane's weakness in throwing ninja tools.

While shuriken might not kill people, that was only true for named characters.

For nameless cannon fodder, shuriken and kunai were lethal weapons.

For instance, Kabuto once used shuriken to kill two squads of Anbu, and Itachi frequently used thrown kunai to kill while he was an Anbu himself.

On the other hand, Uchiha Kurohane would likely have to participate in the Second Shinobi World War, and even if he managed to avoid that, he would eventually have to participate in the Third Shinobi World War.

He would encounter a massive number of fodder ninja in battle, and to avoid wasting chakra, cheap shuriken were an excellent means of killing enemies.

Just as Uchiha Kurohane was reviewing his system rewards, Kushina Uzumaki looked at the three genin writhing in pain on the ground, her face full of astonishment.

Kurohane-kun defeated three genin all by himself? And he one-shot every single one of them! He's so amazing! Is this the strength of a Konoha dead-last? He's much stronger than the geniuses from the Village Hidden in the Whirlpools! And his Sharingan is so cool.

Kushina Uzumaki recalled the dashing figure of Uchiha Kurohane dual-wielding kunai to deflect the barrage of shuriken, her expression becoming infatuated and her eyes filled with admiration.

She had already become a little fangirl of Uchiha Kurohane.

Noticing that Kushina Uzumaki was still lying on the ground, Uchiha Kurohane walked over to her and asked gently.

"A shuriken was headed your way just now, so I pushed you out of the way in the heat of the moment. Are you hurt?"

Kushina Uzumaki hadn't reacted in time; if Uchiha Kurohane hadn't pushed her, she would have been struck by the shuriken.

She realized she had been saved once again, and her heart was filled with both gratitude toward Uchiha Kurohane and a sense of deep embarrassment.

She had originally intended to protect Uchiha Kurohane, hoping to repay his kindness while demonstrating her own strength.

Instead, she had been frozen by the sight of real weapons and had remained lying on the ground, unable to get back up.

For a ninja, this was truly humiliating.