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Even with all his upgrades, he was acutely aware of lingering limitations. He still couldn't read other people's scrolls or documents, but his photographic memory and cognitive enhancements allowed him to create and recall his own scrolls flawlessly. It was akin to a chess grandmaster playing dozens of games blindfolded, keeping track of every move without faltering. To keep his scrolls organized, he would need to devise a system: maybe a mark with unique grooves on the side, so he could distinguish them by touch alone.

He then turned to the Basic Upgrade. Initially, he'd planned on pushing Chakra Sensitivity to Tier 3, but with his sensory enhancements already pushing his awareness to new heights, what he craved now was raw power.

Instead, he chose Chakra Density. The instant he activated it, he could feel the change, a new intensity in his chakra reserves, making every pulse denser and more potent. His reserves, already comparable to a Jonin's, were now brimming with amplified energy. It was challenging to measure his exact levels, as each release felt compact yet packed with force.

Next, he looked at the Affinity Reward. Lightning was still listed, almost as if waiting for him, despite his previous upgrades. It felt like fate. He'd always had a natural connection with lightning; after his first upgrade, it had become a genuine talent. Now, with this third upgrade, he knew he was venturing beyond talent—he was on the path to true lightning mastery.

Choosing lightning without hesitation, he felt clarity snap into place. Techniques he'd once struggled to perfect now felt as effortless as breathing. It was as though the intricate flows and structures of lightning jutsu became visible to him, each pulse and pathway unfolding in his mind's eye. His Thunder Scalpel, a technique he'd refined over time, now seemed full of untapped potential, almost waiting for him to reshape it. He could see how it might extend and flex like a whip, a form he'd never fully achieved but now seemed within reach.

And yet, he knew he couldn't rush into the battlefield just yet. His body, newly enhanced, felt powerful but slightly unfamiliar. Each movement was stronger, with an edge that demanded caution. Even his balance felt different, his muscles more responsive yet somewhat off-kilter. His physical power had noticeably increased, and his enhanced lightning affinity would require careful control.

These upgrades revealed new potential, especially in blending chakra with his physical strength. He thought of Tsunade's chakra-enhanced strength technique and considered how he could adapt it, layering an internal lightning boost to heighten both speed and power. The last time he'd upgraded his lightning affinity, he'd developed a level of immunity; with Tier 3, he sensed that his resistance had strengthened even further, allowing him to handle lightning chakra with less restraint. Combined with his enhanced physique, this affinity would amplify his combat potential.

But power alone wasn't enough. This raw potential needed refining. Before stepping back onto the battlefield, he knew he'd need to train relentlessly, exploring these new limits and fine-tuning his control. The strength was there, the mastery close, but it would take patience and precision to wield it to its fullest, he would be a liability.