Chiyu indeed meant exactly that.
The Eternal Mangekyō Sharingan—the ultimate ocular power of the Uchiha clan!
In the original storyline, only Uchiha Madara and Uchiha Sasuke ever awakened it. To achieve it requires extremely harsh conditions and high difficulty, with unimaginable risk! It demands that two clan members who have each awakened the Mangekyō Sharingan—one of them must "gift" their Mangekyō eyes to the other. Only then, upon a successful transplant and fusion, is there a chance of awakening the Eternal Mangekyō Sharingan!
But bear in mind, even unlocking an ordinary Mangekyō Sharingan is already exceedingly difficult. Throughout the clan's generations, very few ever managed it. Let alone successfully transplanting and fusing someone else's Mangekyō eyes without rejection—an even greater rarity!
One way to increase that success rate is transplantation between close blood relatives.
Fugaku and Uchiha Itachi have both awakened the Mangekyō. Not only that, they are father and son.
The odds of a successful fusion transplant are quite high!
This is also part of Chiyu's plan!
As for Uchiha Sasuke… He is Indra's reincarnation. There's no need for Chiyu to worry over him! Even without Itachi's Mangekyō donation, Sasuke's growth rate would not be slow.
But for now, the clan as a whole needs more strength!
If Fugaku, the clan leader, acquires the Eternal Mangekyō Sharingan…that would truly be adding wings to a tiger!
Fugaku could not help feeling utterly shaken. Of course, he knew of these secrets as clan head, but it always seemed like old legend or myth—like the tale of Madara and Izuna. And now it lay before him, so real, so stark.
He found it all surreal.
"The Eternal Mangekyō Sharingan…
But, Chiyu—even if I want to transplant them, it's not something so easily done…"
"Indeed. Still, it's the best choice."
Fugaku inhaled deeply.
Chiyu then halted the karmic flames of his Magatsuhi no Kami, letting Itachi's corpse fall into Fugaku's hands to handle.
Fugaku thought of something else.
"Chiyu, on the other side…really no problem?"
"Though I do believe you've prepared thoroughly, that masked man claims to be Uchiha Madara! He's the one who unleashed the Nine-Tails upon us, forcing the Fourth Hokage, Namikaze Minato, and the Nine-Tails' jinchūriki Kushina Uzumaki to their deaths. Even if he's not truly Madara, he's still extremely dangerous!"
"I understand. I'll dispel this shadow clone and focus on the fight over there. As for what's here…
Fugaku replied gravely,
"Trust me. Once I settle matters here, I'll come to the Police Force and back you up!"
Chiyu remained noncommittal.
In a poof, he vanished in a swirl of white smoke.
In the shattered remains of that home, only Fugaku, Mikoto, and Sasuke remained.
Everything lay in ruins.
Fugaku stood silent a moment, then spoke to his wife:
"Mikoto, take Sasuke and leave for now…"
Mikoto had wept herself dry.
"All right, Sasuke… let's go."
Yet Sasuke was in shock, soul-wounded beyond words. He did not resist being led away, small hand in hers. Mother and child moved off step by slow step.
Neither Fugaku nor Mikoto noticed that, at that moment, Sasuke's eyes shone with a faint blood-red glow…
Within that empty courtyard, Fugaku gazed down at Itachi's charred body.
He hesitated for a long time… but in the end, gritted his teeth and reached out toward those Mangekyō eyes.
The Uchiha clan needed power!
And for that, he would pay any price.
Under the scarlet moonlight, not long ago:
At the Uchiha Clan District, Police Force Headquarters…
The oppressive tension thickened. All officers sensed an impending crisis, so the Police Force had boosted security. Most personnel were ordered to stand guard rather than leave on patrol.
Each face showed vigilance and anxiety. No one could relax.
Not far away, the air itself wavered, as though rippling like water. Then, a cloaked figure in black silently appeared.
He stared at the Police Force Headquarters, perhaps reminiscing, and stood awhile in silence. Then he shook his head and fired off a signal into the night—meant for Uchiha Itachi.
This done, his masked features betrayed no emotion as he strode toward the Police Force Headquarters. In his hand was a samurai blade.
Before long, the intruder was confronted by several Police Force ninja:
"Halt! Who goes there?!
This is Police Headquarters—no trespassing!"
Five or six Uchiha officers advanced to stop him, but the masked man did not pause. In a flash, he lunged forward, sword arcing mercilessly at the lead officer!
That officer was a skilled Uchiha jōnin, so he instantly flung shuriken to intercept. Yet the masked man did not dodge: the projectiles just phased through him, as though his body were intangible.
Everyone's eyes went wide.
There was no time to finish. The masked man's sword, unstoppable, now slashed down on the jōnin, about to kill him. But in that crucial instant—
Sparks flew. A kunai intercepted the attack in perfect timing!
The masked man frowned under his breath, gazing at this newcomer who had intervened. It was not Uchiha Chiyu— but Hatake Kakashi!
"Exactly as Chiyu-sama anticipated. You've shown up after all, calling yourself Uchiha Madara…"
Kakashi pressed forcefully, deflecting the opponent's blade. Both sprang apart and regarded each other from a distance.
The masked man's eyes flickered with surprise—he had not expected that Chiyu would foresee everything so precisely. Nor did he guess that here, instead of Chiyu himself, he'd encounter one he knew well but hadn't anticipated:
Kakashi, of the Sharingan—the "Copy Ninja."
"Kakashi of the Sharingan…"
He calmed himself. "I never thought we'd meet here."
Kakashi stayed taut in alertness.
"Coming from someone who claims to be Madara, it's a dubious honor…
"…But you're the culprit behind the Nine-Tails assault, responsible for my master and Lady Kushina's deaths. If you've shown up tonight—
I'll see that old score is settled."
The masked man sneered.
"Settle old scores? You overestimate yourself, Kakashi. Even the Yellow Flash Namikaze Minato died by my hand. Where do you find the nerve?"
Kakashi quietly lifted the headband over his left eye, revealing the scarred Sharingan he bore.
"This isn't about nerves or not—it's about what I must do.
And more importantly, Chiyu-sama specifically deployed me here for you…"
"Which must mean he has his own reasons!"
A faint hum—Kakashi's left eye spun from a three-tomoe shape to its Mangekyō form.
The masked man was taken aback.
"A Mangekyō Sharingan…?
You can now wield such power?"
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