Kakashi smiled faintly.
"Shark-face, I'm curious too—just how strong an S-rank rogue ninja really is."
Kisame Hoshigaki narrowed his eyes.
"Shark-face?"
"Heh. Not a bad nickname."
He swung Samehada down from his back.
The massive, spiked blade hummed ominously as it cut through the air.
"Since you're so interested… let me see if that sharp tongue of yours is worth anything! Samehada was born to cut people down!"
Kakashi drew Kiba.
Lightning instantly surged along the blade, crackling violently.
He spun the short sword once.
"Is that so?"
"Then my blade exists to electrocute."
The moment Kisame saw Kiba, his pupils shrank.
"Kiba?!"
"Did you kill Kurotsuchi Raiga?!"
Kakashi shrugged.
"He wanted money. So did I."
Veins bulged in Kisame's eyes.
"Then I'm even more excited!"
"Let me see whether you're truly qualified to wield that weapon!"
Itachi spoke calmly from the side.
"Kisame, finish it quickly."
"Don't drag this out, or Konoha's reinforcements will arrive."
Kisame grinned.
"Got it!"
Boom!
He stomped the ground, shattering it, and shot forward like a cannonball.
Samehada was raised overhead.
"Take this!"
Kakashi's Sharingan spun rapidly.
Every detail—muscle tension, chakra flow, breathing rhythm—was completely exposed to his vision.
Instead of meeting force with force, Kakashi moved.
White Fang swordsmanship.
Fast. Precise. Ruthless.
Kiba became a streak of lightning—thrusting, deflecting, cutting, slashing.
Every strike was clean and lethal.
Kisame's power was overwhelming, but his speed lagged behind.
Kakashi slipped past his attacks with ease and countered, blade flashing toward vital points.
"What?!"
Kisame could only block with Samehada.
Clang!
Kakashi shifted instantly, striking from another angle.
Clang!
Again.
Clang! Clang! Clang!
In mere seconds, dozens of strikes landed.
Each one was viciously tricky.
Kisame was completely suppressed, forced into nonstop defense, unable to land a single clean hit.
"Damn it… this swordsmanship…"
What made it worse—
The Lightning Release chakra on Kiba surged with every strike.
Even though Samehada absorbed chakra, Kakashi's attack frequency was too fast.
Bzzzz!
Electric currents seeped through, numbing Kisame's body and slowing his movements.
"So this is the White Fang's swordsmanship…"
Now Kisame finally understood how this man had killed Raiga.
"Speed. Accuracy. Timing."
"All of it is top-tier!"
Kakashi knocked Samehada aside and followed with a horizontal slash.
Kisame barely avoided it.
Blood spilled from his shoulder.
Itachi's gaze sharpened.
"Kisame is being suppressed…"
"Kakashi's strength has grown even further."
Realizing swordsmanship wouldn't work, Kisame leapt back and began forming seals.
"Then I'll use what I'm best at—"
"Water Release—"
"Kisame."
Itachi's voice cut in.
"Don't make a scene."
"I'll handle this."
Kisame stopped, surprised.
"Itachi?"
Itachi stepped forward, eyes fixed on Kakashi.
"Kakashi-senpai."
"Your strength is impressive."
"But…"
His Sharingan spun.
"I'll show you what true despair looks like before the Sharingan."
Kakashi watched Itachi approach, lips curling slightly.
He didn't avoid Itachi's gaze.
Instead, he stared straight into those crimson eyes—and even took a step forward.
Since equipping the Zetsu card, Kakashi had discovered a terrifying truth.
The Sharingan's limits weren't the eyes themselves—but the body using them.
Obito awakened the Mangekyō the moment he saw Rin die, then immediately slaughtered enemies with Wood Release.
Why?
Because half his body was rebuilt with Hashirama cells—overwhelming life force that supported the Mangekyō's consumption.
But Kakashi of the past was different.
An outsider.
Limited chakra.
A Sharingan he couldn't turn off.
Even after awakening Kamui, he could barely use it once without collapsing.
The problem was never talent.
It was capacity.
Now, that weakness was gone.
Zetsu's physique—born from the God Tree and Kaguya's will—offered life force and chakra compatibility beyond ordinary Hashirama cells.
For Kakashi, the Mangekyō was no longer a burden.
It was an extension of himself.
He had already possessed this power as early as the Chūnin Exams.
He simply chose not to reveal it.
Konoha's upper ranks were filled with vultures.
Danzo would smell that power instantly.
Killing Danzo was easy.
Politics was not.
But here—
A deserted forest.
Two S-rank rogue ninja.
No witnesses. No restraint.
Perfect.
Kakashi's intent was clear.
Force Itachi to act.
Enter his mental world.
Touch the power of Shisui's Mangekyō.
Kotoamatsukami.
The strongest genjutsu.
"Come on, Itachi," Kakashi thought coldly.
"Use Tsukuyomi."
"I've prepared a surprise for you too."
Across from him, Itachi narrowed his eyes.
"Kakashi-senpai…"
"You're far too confident."
"Before the Sharingan, all taijutsu and ninjutsu are meaningless."
He closed his eyes.
When they opened again—
The three tomoe fused into a black, rotating shuriken.
Mangekyō Sharingan.
Kisame stepped back with a grin, Samehada resting on his shoulder.
"Itachi's getting serious."
Itachi's gaze locked onto Kakashi's, his voice cold and absolute.
"Tsukuyomi."
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