The sun had not yet risen on the horizon, but the sky was already beginning to take on a cold, pale blue hue. After his brutal and successful breakthrough to the middle stage of Body Tempering on the outskirts of the Forest of Death, Naruto Uzumaki did not return to his apartment. His body, now dense and overflowing with terrifying vitality, did not require the rest of an ordinary mortal.
Instead, his feet led him toward a sector of Konoha he had always avoided in his past life, but which now, with his refined spiritual senses, shone in his perception like an open wound in the land.
It was a vast expanse of walled land on the outskirts of the village. As he crossed the imposing wooden gates bearing the symbol of a red and white fan, the air changed drastically.
There were no birds singing. No insects buzzing. The Natural Energy here was stagnant, heavy with the echo of a dark and oppressive Yin. In the Immortal World, Naruto would have instantly identified this place as a "Slaughter Field," a site where countless souls had been violently and simultaneously cut down, leaving an indelible stain on the flow of the world.
The Uchiha Compound.
Naruto walked through the dusty streets, flanked by empty houses with boarded-up windows. An entire lineage eradicated in a single night, he reflected, his footsteps soundless on the cracked pavement. And the only survivor is a child drowning in his own resentment. The heavens of this world are truly ruthless.
The Echo of Weakness
He followed the chakra trail, erratic and filled with frustration, until he reached the main training yard of the compound.
There stood Sasuke Uchiha. He was shirtless, his pale skin glistening with a thick layer of sweat. He was breathing heavily, throwing kunai and shuriken at a series of worn wooden targets. His movements were fast, ferocious, but lacking the fluidity of water. They were dictated by anger.
Sasuke threw a final kunai with a choked shout. The blade struck the edge of the target and bounced off, embedding itself harmlessly in the ground.
The Uchiha fell to his knees, striking the ground with a clenched fist. "Damn it! It's not enough! He'd kill me in a second!"
"Your movements are noisy, Uchiha. And your mind is a pond clouded with mud."
The deep, calm voice echoed barely three meters behind Sasuke's back.
Konoha's prodigy froze. A chill of pure terror ran down his spine. He spun around at vertiginous speed, drawing a spare kunai in a pure act of survival instinct.
Naruto stood in the center of the yard. He wore dark clothes, slightly stained with forest dust, and his blue eyes looked at him with an indifference that burned more than any insult. Sasuke had not heard his footsteps. He had not even sensed his presence until the blond boy spoke.
"You…?" Sasuke gritted his teeth, slowly standing up with the kunai still raised. "What the hell are you doing here, loser? This is private property. Get lost before I kill you."
Naruto did not react to the threat. With the density of his bones in the middle stage of Body Tempering, that kunai would shatter against his throat before it could pierce his skin.
"Lower your toy weapon, Sasuke," Naruto said, taking a slow step forward. "I didn't come to fight. I came to understand. Your teacher, Kakashi, possesses a red eye that reads the flow of energy. You told me you want to restore your clan. I deduce that eye is the inheritance of your bloodline."
The mention of the Sharingan and his clan made Sasuke's eyes widen, filling with irrational fury. "What do you know about my blood? You know nothing! You have no right to speak of my clan!"
Sasuke lunged forward, blinded by pride and trauma. He thrust directly at Naruto's chest, seeking to wound him, seeking to erase that expression of unshakable superiority from his face.
Naruto did not dodge. He raised his right hand at a speed Sasuke's mortal eyes could not register and caught the metal blade of the kunai between his bare fingers, a millimeter from his own clothing.
Sasuke tried to push forward, but it was as if he had driven his weapon into the side of a mountain of solid iron.
CRACK!
With a simple twist of his wrist, Naruto broke the thick steel blade of the kunai in two. The metallic sound echoed through the empty yard. Sasuke staggered backward, staring at the broken handle in his hand in utter disbelief.
"In the cultivation world, what you suffer from is known as a 'Heart Demon,'" Naruto stated, releasing the broken piece of metal, which fell to the ground with a dull clang. "An unresolved trauma that blocks your meridians and poisons your progress. You want to kill someone. You want revenge. Revenge is a valid Dao, Uchiha… as long as you have the strength to sustain it. At this moment, you are weak."
Sasuke trembled. The words were knives sinking into his deepest insecurities. He wanted to shout at him, he wanted to attack with fire, but the physical display of power he had just witnessed paralyzed him. Naruto had broken steel with his fingers.
"What do you want?" Sasuke finally whispered, his voice slightly breaking under the weight of his own helplessness.
The Blood Pact and Understanding
Naruto clasped his hands behind his back, his posture radiating the authority of a monarch.
"That eye," Naruto began, his tone turning analytical. "The mutation of your bloodline. Yesterday I saw how it consumed Kakashi's chakra, accelerating his temporal perception. However, you, the direct heir of this blood, have mortal and blind eyes. Why? What physiological or spiritual condition is required for the lock of your bloodline to open?"
Sasuke lowered his gaze, the memory of that fateful night threatening to suffocate him. The red moon. His parents' blood. His brother's silhouette.
"It awakens… through loss," Sasuke murmured, the words tasting like ash in his mouth. "An extreme emotion. Pain, despair, or terror in the face of death. The brain releases a special chakra that affects the optic nerves and changes the eyes. That is the Sharingan. I… I awakened it that night, the night of the massacre. But I fainted. And since then, I have never been able to activate it again. I am too weak to call it at will."
Naruto closed his eyes, absorbing the information. In his millennia-old mind, the pieces fell into place with mathematical precision.
An emotional lock tied to the optic nerves, Naruto analyzed. The brain acts as a catalyst, pumping pure Yin energy under extreme stress to mutate the eye tissue. It is a biological and spiritual defense mechanism. If the child cannot activate it now, it is because his energy channel to the eyes has closed after the initial trauma, or because his current body is too fragile to force the flow without the catalyst of pain.
Naruto opened his eyes. The light of dawn finally reached the Uchiha yard, illuminating Sasuke's pale face and the blond boy's inscrutable expression.
"Pain is an efficient teacher, but a clumsy one," Naruto declared. "Relying on despair to achieve your power is leaving your strength at the mercy of chance. A true cultivator does not wait for the world to hurt him to evolve; he forces his body to obey his will."
Sasuke suddenly lifted his head. "What are you talking about? There is no other way. It is the curse of the Uchiha."
"A curse is just a seal no one has learned how to break," Naruto replied coldly. "You have the genetic key. I understand energy flow and meridian anatomy better than any elder in this village, including your Hokage."
Naruto stepped toward Sasuke, extending his hand with his palm facing upward.
"I offer you a deal, Uchiha," Naruto said, his deep voice resonating like distant thunder. "Tell me the details of your clan. Describe everything you know about the limits, evolutions, and blindness that afflicts your bloodline. Show me your family scrolls if necessary. In exchange for that knowledge…"
Naruto paused, letting anticipation fill the silence.
"…I will be your catalyst. I will map your optical meridians. I will teach you how to force that Yin chakra flow into your brain without needing to cry over the death of another loved one. I will help you master your own eyes."
Sasuke was breathless. The deal sounded like heresy. It sounded impossible. The Sharingan could not be forced through physical training or chakra control; that was what his clan's history dictated for centuries.
But in front of him was a boy who could crush solid wood with his hand, who had crushed a Jonin elite's center of gravity with a piece of paper, and who caught blades as if they were dry leaves. A boy who spoke with the certainty of a millennial god.
If he can do all that… Sasuke thought, his heart pounding violently in his chest, his thirst for power drowning out any rational doubt. If he can teach me to control the Sharingan at will… I'll be one step closer to Itachi.
Sasuke looked at Naruto's outstretched hand. There was no friendship in Naruto's gesture. No camaraderie of the "Will of Fire." It was a purely martial transaction. Knowledge in exchange for power.
Slowly, with a trembling hand, Sasuke Uchiha raised his arm and shook Naruto Uzumaki's hand.
"Deal," Sasuke whispered, his black eyes burning with a sickly determination.
Naruto nodded slightly, releasing the grip. The first genuinely useful pawn had been placed on his board.
"Good. Clean yourself up, Uchiha," Naruto ordered, turning away to walk toward the compound's exit. "Today begins the first lesson. We will see if your body is capable of withstanding the pressure of absolute control."