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The Forest of Death was quiet, the trees swaying under the soft wind as if holding their breath. Kirito sat cross-legged in the center of his hidden lab, the air around him shimmering faintly from layers of chakra suppression seals. His shadow clones worked tirelessly around him: some analyzing the Sharingan eyes preserved in chakra-stabilized jars, others testing minor fuinjutsu arrays, and a few recording detailed chakra flow diagrams on scrolls he had prepared.
For months, he had studied the data stolen from Orochimaru's secret lab. He had concluded that DNA implantation, while theoretically powerful, was far too volatile. Even the enhanced chakra core inside him could not guarantee survival for a living host. The risk of failure was astronomical.
Now, Kirito's goal was clear: replicate the power of Kekkei Genkai and forbidden techniques through fuinjutsu and controlled chakra manipulation.
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The First Step: Chakra Mimicry
Kirito began by carefully analyzing the flow of chakra in the Sharingan. His clones ran simulations, feeding the information back into his core. He traced the subtle currents responsible for ocular genjutsu, elemental perception, and heightened reflexes.
If I can bind this signature to a seal, he thought, then I can replicate its effects without risking the host body.
He sketched multiple arrays on parchment, layering seals that could stabilize the Sharingan's chakra pattern when activated. Each array was designed to:
Replicate visual perception enhancements.
Simulate the activation of genjutsu techniques.
Safely store chakra for instant release during combat.
Using one of his clones as a test subject, Kirito carefully placed micro-seals around the clone's eyes. The clone's pupils shimmered faintly, and it moved with heightened reflexes, perfectly simulating a Sharingan wielder's combat abilities.
Kirito nodded. It works. Safely, predictably, and without DNA alteration.
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Elemental Kekkei Genkai Replication
Next, he turned to elemental fusion. He recalled the C-rank missions he had completed with temporary teams, where he had observed minor elemental combinations. Drawing inspiration from these, he devised fuinjutsu arrays capable of simulating Kekkei Genkai effects.
Fire and wind, earth and lightning, even more exotic combinations like lava or storm techniques could be bound into small, portable sealing arrays. These arrays, once activated, would temporarily enhance the chakra flow of a user, allowing them to perform techniques normally limited to specific bloodlines.
Clones tested each combination, their bodies glowing faintly as the fused chakra coursed through them. Each successful test was meticulously recorded, then sealed with a suppressor tag to prevent accidental activation outside the lab.
This is the way forward, Kirito thought. Power without sacrifice.
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Sharingan Training and Genjutsu Replication
With ocular techniques safely replicable through seals, Kirito focused on genjutsu. He created miniature test arenas inside his lab, where clones trained in simulated combat against other clones. Using his fuinjutsu arrays, he allowed clones to temporarily access Sharingan-like perception and genjutsu capabilities.
The results were impressive. Clones were able to predict opponent movements with uncanny accuracy, execute illusions with precise chakra control, and even synchronize attacks with each other in complex formations.
Eventually, Kirito mused, I can teach these techniques to others without endangering anyone. Every Sharingan effect, every genjutsu nuance, can be encoded and unleashed through seals.
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Safety Through Seals
As he worked, Kirito continuously reinforced his own body with sealing techniques. His chakra core, already stable and immensely powerful, was layered with arrays that:
Suppressed accidental surges of energy.
Regulated chakra flow during high-intensity experiments.
Allowed him to remotely stabilize his clones in case of emergency.
Every experiment, every trial, was conducted under the strictest control. Failure was no longer an option—his clones were expendable, but the knowledge was priceless.
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Integration With Shadow Hunter Work
Even as he refined his fuinjutsu and Sharingan replication techniques, Kirito did not neglect his Shadow Hunter activities. Solo bounty hunts continued, targeting rogue genin and chunin, with occasional encounters against jōnin-level targets. Every real-world battle informed his lab experiments, giving him data on chakra strain, combat dynamics, and the effectiveness of seals under stress.
After each mission, he returned to the lab, comparing battlefield observations with simulations, adjusting seals, and perfecting arrays. Over time, he created a system where clones could simulate high-level combat scenarios using Sharingan and Kekkei Genkai abilities safely, allowing him to train endlessly without risking his own life.
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Refining the Technique
Months passed. Kirito's lab became a symphony of controlled chaos:
Jars of eyes and DNA samples hummed faintly with stored chakra.
Scrolls and fuinjutsu arrays lined the walls, glowing with subtle inscriptions.
Shadow clones moved in silent choreography, testing arrays, recording data, and running simulations.
Kirito himself focused on perfecting the balance between chakra core output and fuinjutsu stability. The arrays he designed could now:
Temporarily grant Kekkei Genkai abilities to clones or himself.
Replicate Sharingan perception and genjutsu for both combat and reconnaissance.
Safely neutralize dangerous chakra flows from Cursed Seals.
He ran the final test that night. Ten clones, each equipped with a Sharingan replication seal and elemental Kekkei Genkai arrays, sparred against another ten clones under full combat conditions. Every movement, every strike, every release of chakra flowed without interruption. The arrays held. The clones were unharmed.
Kirito exhaled, allowing his chakra to settle. It works. Safely. Reliably. Perfectly.
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A Step Beyond Orochimaru
For the first time since stealing Orochimaru's data, Kirito felt a sense of accomplishment beyond mere survival or power. He was not simply copying the Sannin's techniques—he was improving them, making them safer and more versatile.
Orochimaru sought immortality and genetic perfection, he thought, watching clones practice in synchronized precision. I seek understanding and control. Knowledge without recklessness, power without death.
His clones, synchronized with the fuinjutsu arrays, moved in perfect unison. He could now simulate elite-level jōnin combat within the lab, testing strategies, chakra flow, and seal effectiveness endlessly.
The Shadow Hunter and the laboratory genius had merged: one who struck fear into the underworld, and one who wielded knowledge with absolute precision.
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The Next Step
Kirito looked at the Sharingan eyes resting in their jars, glowing faintly in the dim light. The Hashirama cells lay preserved, waiting for a safe method of study. He had created an arsenal of replicable, sealed techniques, and clones that could train indefinitely without risk.
Yet he knew this was only the beginning. One day, he would push these experiments further—combine techniques, develop more advanced sealing systems, and perhaps even create a new form of shinobi that relied not on reckless genetic manipulation, but on mastery of chakra, seals, and intellect.
For now, he allowed himself a brief moment of satisfaction.
One day, every secret in this world will belong to me, he whispered softly, the glow of the lab reflecting in his eyes. And no one will be able to stop it.
The forest outside was quiet. But inside, the future of shinobi power was being forged, one seal, one Sharingan, one chakra flow at a time.
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