Naruto: Unlimited Kekkai Genkai

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The Uchiha who had been speaking was a young man in his early twenties. Reaching the level of three-tomoe Sharingan at this age made him a standout, even within the esteemed Uchiha clan. As a Jōnin-level shinobi, he was naturally proud of his lineage, and like many Uchiha, his confidence in the power of his Sharingan ran deep. This pride, however, would soon cost him dearly.

As soon as he locked eyes with Ishigami Hara, a slight disorientation washed over him. In an instant, he found himself in an entirely different world.

It was a nightmarish landscape—an endless, blood-red sky dominated by an enormous, looming Sharingan, with its three tomoe rotating slowly, filling his vision. Beneath him lay a pitch-black earth, dark as ink, radiating an ominous and unsettling aura.

Shocked, the man realized he was bound to a cross, arms spread wide, legs immobilized, completely unable to move.

"How could this happen!?" he exclaimed, as the realization hit him that he had fallen into a powerful genjutsu.

Desperate, he tried to unleash his chakra to break free from the illusion, attempting to use the Uchiha clan's unique methods for dispelling genjutsu. But no matter how hard he struggled, it was futile.

Then, the space before him twisted slightly, and a familiar figure emerged—none other than Ishigami Hara.

Calm and collected as ever, Ishigami Hara held a kunai in his hand. His expression was unreadable, yet unnervingly tranquil.

"Excuse me, I haven't asked your name yet," Ishigami Hara said, his voice steady.

"What are you going to do?!" the man demanded, still struggling in disbelief. His anger surged as he shouted, "You dare to attack me? I am Uchiha!"

"And?" Ishigami Hara responded coolly.

Taking a deliberate step forward, Ishigami Hara gently but firmly drove the kunai into the man's abdomen, pushing it in slowly, letting the blade slice through flesh as blood trickled down.

"Ahhh!!!" The man's agonized scream echoed through the blood-red world, his voice filled with both pain and fury.

Ishigami Hara calmly stepped back, now holding a second kunai in his hand.

"Can you tell me your name? You're the first Uchiha I've attacked. I'd like to remember it," Ishigami Hara asked once more, his voice calm and unaffected by the man's suffering.

"Curse you! My name is Uchiha Sado, remember it! I'll make you regret this!" Uchiha Sado spat angrily, still writhing in pain. He now knew, beyond a doubt, that his Sharingan was no match for the genjutsu power of the boy standing before him. No matter how much chakra he expended, he couldn't break free, even using the Uchiha clan's specialized techniques for dispelling illusions.

Sado realized that he was utterly trapped.

Ishigami Hara nodded slightly, his voice steady as ever. "Mr. Sado, although I don't know why you came here, I'm certain your intentions weren't good. As a fellow member of the village, I feel it's my duty to help you understand something."

With that, Ishigami Hara took another step forward and plunged the kunai into the opposite side of Sado's lower abdomen. Another agonized scream erupted from Sado's mouth as Ishigami Hara calmly stepped back.

"Be polite," Ishigami Hara said in an almost instructional tone.

Uchiha Sado was now drenched in cold sweat, the pain so overwhelming that his mind was on the verge of breaking. All he could do was curse through the haze of agony.

"Damn it! Damn you! I'll kill you, you b*****d!" he screamed, his voice hoarse and filled with impotent rage.

Ishigami Hara calmly raised his hand, still holding the kunai, and spoke again: "This is the Tsukuyomi space. I'm sure you've heard of it—the ultimate illusion of the Uchiha clan."

He paused for a moment, letting the weight of his words sink in, before continuing, his tone still steady. "Here, I control your five senses. In this space, I am essentially a god."

A faint smile tugged at the corner of his lips as he added, "Of course, this isn't the real Tsukuyomi. It's a special illusion space I've created, modeled after the technique."

Ishigami Hara's voice was calm, but the underlying menace was unmistakable. "One second here equals one day in the real world. With my level of pupil power, maintaining this illusion is effortless. So... please enjoy it."

Before Uchiha Sado could respond, the third kunai had already pierced his abdomen, sending waves of searing pain through him.

"AHHHHHHH!!!!"

Sado's anguished screams echoed through the blood-red world, but he could do nothing as the giant Sharingan in the sky loomed over him, a silent, watchful presence that offered no escape.

"By the way, I've named this technique Moon Desecration," Ishigami Hara continued, his voice unwavering. "In this space, you are my slave. I control everything about you and desecrate everything you hold dear."

Ishigami Hara wasn't lying. This technique wasn't exactly Tsukuyomi, the famed Mangekyō Sharingan ability. Tsukuyomi was an advanced genjutsu that required immense chakra reserves and mastery over Yin Release, making it a Forbidden Technique of the highest level. Only those with significant Mangekyō-level power could afford the enormous chakra cost and exert the necessary control.

By simplifying the principles of Tsukuyomi, Ishigami Hara had created a technique that focused purely on mental and sensory torment. While Tsukuyomi could force its victims to experience days of pain in mere moments, as Kakashi had once endured, Ishigami Hara's version prolonged the suffering over a full day, or twenty-four hours in real time.

Against someone with only a three-tomoe Sharingan, Ishigami Hara's Mangekyō-level pupil power made the outcome inevitable.

"So, for the next twenty-three hours, fifty-nine minutes, and fifty seconds, I'll be in your care," Ishigami Hara said as the fourth kunai plunged into Uchiha Sado's chest.

The scream that followed was even more agonizing than the last. The physical pain was overwhelming, yet Uchiha Sado's mind remained intact enough to feel every second of it. Under Ishigami Hara's precise control, Sado was unable to pass out or escape into unconsciousness. He was trapped in an endless cycle of unbearable suffering, his energy sustained by the illusion.

"No!" Sado's voice wavered as the reality of his situation set in. He was terrified. The pain was one thing, but the cold, unfeeling look in Ishigami Hara's eyes was far worse. Sado had seen many things in his life, but never such an utter disregard for life.

When he looked into Ishigami Hara's eyes, he felt as if he were nothing more than a dead object—insignificant, disposable.