Naruto: If Sasuke Awakens Entry System

The sky was overcast with red clouds, and the black robes of the Akatsuki fluttered in the wind.

Itachi halted his steps, his voice calm yet piercing: "Sorry for the long wait, Sasuke."

Sasuke narrowed his eyes, his voice cold and steady: "You're alone. Where are your companions?"

Itachi smirked slightly: "I am enough. Sasuke, you come with a group. Do you lack the confidence to face me alone, or are you still playing games with your companions?"

Sasuke's gaze hardened: "Enough with the chatter. This duel is between you and me. If you understand, then let's begin!"

He took a step forward, his resolve unwavering.

Itachi raised his chin slightly, his eyes calculating: "Don't be hasty, Sasuke. Let's talk about the past first..."

Sasuke's eyes flickered with a mix of emotions. He, too, wanted to confront the truth about the night of the massacre.

Karin and the others watched nervously. Could Itachi be so cruel as to reveal the truth to unsettle Sasuke?

Tsunade and the others listened intently, their curiosity piqued.

In the distance, Zetsu emerged from the ground, observing silently.

Itachi began, his voice devoid of emotion: "The Sharingan, the unique bloodline of the Uchiha clan, can only be awakened through emotional trauma..."

"Among them, the Mangekyō Sharingan is particularly special. Only a select few can awaken it, and the conditions are harsh..."

Itachi's expression remained unchanged: "Yes, the condition is to kill the person you hold dear with your own hands."

Sasuke remained silent, his face unreadable.

Swish!

Itachi revealed his Mangekyō Sharingan, staring intently at Sasuke: "Sasuke, it seems you've followed my instructions... to kill the one you cherish."

Gasps echoed around them. The revelation of how the Mangekyō was obtained shocked everyone. Did this mean Uchiha Sasuke had also...?

Sakura's voice trembled with disbelief: "Impossible! Sasuke would never do that!"

Sasuke felt a warmth in his heart. Thank you for believing in me, Sakura...

In truth, Sasuke's Mangekyō was awakened through the system's upgrade, not by taking the life of someone he cherished.

With a swift motion, the hexagram pattern appeared in his eyes.

Sasuke activated his Mangekyō: "Itachi, unlike you, my Mangekyō is not tainted with the blood of those I love!"

Sakura's heart soared with relief. She knew Sasuke could never be so heartless!

Itachi's expression shifted slightly. What? Impossible! Yet Sasuke's demeanor showed no signs of deceit. Could it be that Sasuke truly hadn't killed anyone he cherished?

White Zetsu whispered: "Why did Itachi's expression change?"

Black Zetsu replied: "If Sasuke awakened the Mangekyō without killing someone he cherished, then his talent surpasses all Uchiha before him, even... Uchiha Madara!"

White Zetsu was taken aback: "Huh?"

Black Zetsu continued: "Because the method of awakening the Mangekyō was passed down by Uchiha Madara!"

White Zetsu exclaimed: "So, Uchiha Madara also awakened his eyes by killing someone he cherished?"

Black Zetsu nodded: "It's almost certain."

Itachi frowned slightly: "Sasuke, if you still cling to the naive belief that you can't kill those you cherish, then you won't be able to defeat me today!"

Sasuke sneered: "Itachi, in front of you, I will become ruthless!"

System, display entries!

[Itachi's entries: Mangekyō Sharingan (Gold ★★★★★), God of Fire Style (Gold ★★★★★), Forbidden Technique: Izanagi (Gold ★★★★★), Forbidden Technique: Izanami (Gold ★★★★★), God's Envy of Talents (Gold ★★★★★)...]

[Forbidden Technique: Izanagi (Gold ★★★★★), the art of rewriting fate; activated at the cost of blinding one of the Mangekyō, it can transform unfavorable events into dreams, thus altering your fate.]

Sasuke was taken aback. Rewriting reality into dreams?

Damn it, Itachi had mastered such a technique. This was going to be troublesome!

[Forbidden Technique: Izanami (Gold ★★★★★), a technique that determines fate; activated at the cost of blinding one of the Mangekyō, it traps the target in an infinite loop without eye contact. Unless the target recognizes themselves, there's no escape.]

Sasuke's eyes widened. Damn it, where did Itachi learn such a terrifying forbidden technique?

He was confident in defeating Itachi, but now the outcome seemed uncertain.

Sasuke steadied himself, his gaze cold and determined. He couldn't lose his composure. No matter how strong Itachi was, he would use the fire of revenge to seal Itachi's fate!

In an instant, the air was thick with murderous intent, like a tiger descending from the mountain.

Itachi narrowed his eyes, acknowledging Sasuke's resolve. It was time to add fuel to the fire!

Itachi: "Sasuke, my foolish little brother, do you know why I didn't kill you?"

Sasuke's face was a mask of fury: "Itachi, I'm no longer the weakling I once was. You can't measure my current strength!"

Itachi smirked: "You're being stubborn again, Sasuke. Fine, I'll tell you. The reason I spared you is tied to another secret of the Mangekyō Sharingan."

Everyone leaned in, eager to hear more.

Sasuke's heart skipped a beat. Could it be related to those two forbidden techniques?

Itachi continued: "This secret is crucial. The Mangekyō Sharingan is destined for darkness once awakened."

Sasuke felt a pang of disappointment.

"Sasuke, you've been using the Mangekyō recklessly. Your eyesight must be deteriorating. How far can you see now?"

Gasps filled the air. Who would have thought the Mangekyō Sharingan had such a drawback?

Sasuke retorted coldly: "Itachi, is that all you have to say? Unfortunately, my Mangekyō isn't as flawed as yours. My Mangekyō will never blind me!"

Thankfully, he had the Sage Body's blessing; otherwise, he wouldn't use Susanoo so freely!

Itachi was stunned: "What? Impossible!"

White Zetsu remarked: "Oh, Itachi's surprised again."

Black Zetsu explained: "Shock is inevitable because no one who awakens the Mangekyō can escape the price of blindness, not even Uchiha Madara!"

White Zetsu added: "In that case, isn't Sasuke's Mangekyō very special?"

Black Zetsu replied: "It's not certain yet. The Mangekyō's abilities vary. Perhaps Uchiha Sasuke has the ability to preserve his eyesight..."

Itachi held his forehead with one hand: "I truly envy you, Sasuke. To be honest, I've reached the point where I need to change my eyes..."

Sasuke's eyes narrowed: "Itachi, do you intend to..."

Itachi stepped forward, laughing maniacally: "That's right, Sasuke. I want your eyes to gain eternal light!"

Boom!

Itachi's murderous aura erupted, his demeanor like a mad beast.

"I want to surpass the peak of the Uchiha—Uchiha Madara!"

"I want to break through my own limits and create a new pinnacle!"

"So, Sasuke, give me your eyes!"

Silence fell, as chilling as death.

Everyone felt a shiver run down their spines. What a terrifying ambition, what a tragic clan!

Sasuke slowly opened his eyes: "Itachi, is this your truth?"

Itachi regained his composure: "That's right."

Sasuke stared at Itachi: "Everything is for revenge. Now is the time to achieve my goal!"

"Itachi, come on!"

The battle was about to begin.

Karin couldn't hold back any longer and rushed forward: "Sasuke, wait, I have something to say!"