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After a grueling two hours of training with his sensei, Sakumo Hatake, and his team, Haruto left the training grounds drenched in sweat but filled with a renewed sense of purpose. The drills had been intense, designed to push each member to their physical and mental limits. While his teammates were likely resting after the harsh regimen, Haruto knew that for him, the real challenge was just beginning. Today was the day—the culmination of months of tireless effort, countless failures, and small victories. The Thunder Scalpel was within reach, and he was determined to make it a reality.

After arriving at his apartment, Haruto quickly consumed a large meal, refueling his body for the hours of work ahead. He needed every bit of energy to maintain focus and endurance. In the quiet of his apartment, he centered himself, mentally preparing for what was to come. The Thunder Scalpel had been his obsession—a fusion of medical ninjutsu and lightning release, combining the surgical precision of the Chakra Scalpel with the raw, destructive power of lightning. While the Chakra Scalpel was effective in cutting, its flaw was its inability to pierce through tougher defenses, like ninja armor. But lightning chakra, volatile and chaotic as it was, had the piercing power he needed to turn the Chakra Scalpel into a true weapon.

The process of combining the two, however, was far from simple. It required the utmost control—medical chakra, delicate and precise, was easily overwhelmed by the wild, untamed nature of lightning chakra. The smallest misstep could destabilize the entire technique. But Haruto had a crucial advantage: his two-mind ability, granted to him by the system. This ability allowed him to split his consciousness into two distinct parts, one of which could remain entirely focused on the complex task of chakra control, while the other kept him aware of his environment and his body's limitations. This, combined with his Tier 2 cognitive upgrade, gave Haruto the mental sharpness to perform at a high level for extended periods without succumbing to fatigue or distraction.

But even with this advantage, Haruto knew the task ahead was monumental. He summoned a single Shadow Clone, not just an ordinary clone, but one capable of using the two-mind ability just like him. This clone wasn't simply a tool—it was an extension of himself, able to operate with the same clarity and multitasking ability. The clone's role was critical, allowing him to perform trial-and-error experimentation at a much faster pace, absorbing and learning from each failure. Together, they would practice, splitting their focus between maintaining control over the lightning chakra and being fully aware of their surroundings.

For the first two hours, frustration mounted. Every time Haruto or the clone attempted to merge lightning chakra into the Chakra Scalpel, the same issue arose: the scalpel destabilized. Lightning, by nature, was unpredictable, and when infused into the precise form of the Chakra Scalpel, it caused the scalpel to flicker in and out of existence or lose its sharp edge entirely. In some cases, the lightning would flare too strongly, burning through the scalpel and rendering it ineffective. In other cases, it wouldn't be strong enough to make any significant difference.

But Haruto wasn't one to give up easily. With each cycle, he adjusted his approach, trying different techniques to find the right balance. Rather than forcing the lightning chakra into the scalpel, he focused on layering it over the existing medical chakra, creating a delicate balance between the two. It was a painstaking process, one that required perfect timing and control. Too much lightning would burn through the scalpel's form, too little and it would fail to provide the piercing power he needed.

Every two hours, Haruto would release the clone, absorbing its experiences and insights. With each failure came a small step forward—a better understanding of the intricacies of the technique, a deeper comprehension of how lightning chakra interacted with the medical energy. Slowly but surely, progress was being made.

Six hours later, Haruto felt the weight of exhaustion pressing against his body, but there was a flicker of triumph in his chest. He stood in the quiet of his apartment, his fingers crackling with electricity. This time, the lightning held steady. Merging with the Chakra Scalpel, it didn't destabilize or flicker out. Instead, it reinforced the scalpel, coating it in a thin layer of crackling energy. Haruto could feel the difference immediately—the scalpel was no longer just a tool for cutting. Now, it had piercing power.

Testing it, he moved toward a wooden training post he had set up for moments like this. With a focused swipe of his hand, the Thunder Scalpel cut cleanly through the wood, leaving behind a scorched, precise incision. The energy from the lightning had given the scalpel the power to slice through defenses that would have resisted the Chakra Scalpel alone. Where the Chidori relied on brute force and thrusting motion to pierce through objects, Haruto had created something that could cut and pierce with subtlety, grace, and lethal precision.

But this was only the beginning. At the moment, the lightning only covered his fingertips, enhancing the scalpel but still limited in its scope. Haruto's vision extended far beyond this small success. His ultimate goal was to expand the Thunder Scalpel to cover his entire hand, amplifying its power and control, and eventually transforming it into a ranged technique. He dreamed of projecting the scalpel at enemies from a distance, combining the speed and destructive power of lightning with the surgical precision of medical ninjutsu.

For now, though, the first phase of the Thunder Scalpel was complete. It was no longer a theory, no longer just an idea. It was real, tangible, and it worked.

Haruto flexed his fingers, watching the electricity dance along his skin, still buzzing from the strain of the hours of training. This was just the start. The road ahead would be difficult—the next steps would be even more challenging—but Haruto's resolve had never been stronger. He had taken the first crucial step toward mastering one of the most dangerous techniques he had ever conceived.

Hence, one of the most lethal S-ranked forbidden jutsu was born, an infant of what it could become. The Thunder Scalpel was in its earliest stage, but with time, dedication, and relentless effort, it would grow into a devastating force, capable of changing the course of any battle.

Haruto had no doubt that he would push this jutsu—and himself—to the very edge. And beyond.