Konoha Hidden Village, Kyohaku Uchiha's concealed underground laboratory.
Completely different from the raging flames and deafening cries of battle outside, this place held only the low hum of machinery, the gentle bubbling of liquids in test tubes, and a scent that blended the fresh fragrance of herbs with some strange life energy. Cold light illuminated Kyohaku's pale yet focused face. His Three-Tomoe Sharingan had long since been activated, precisely observing the violent cellular changes beneath the microscope.
The war had fully erupted. Though he spent most of his time following Orochimaru or carrying out independent missions, the brutality of the battlefield had already been seared deeply into his mind. Severed limbs, ruptured organs, damaged chakra pathways... Too many casualties were not caused by attacks that killed instantly, but by the lack of prompt and effective treatment. Their wounds worsened or left irreversible aftereffects, ultimately forcing them to die in agony or abandon their ninja careers.
"The efficiency is far too low..." Kyohaku set down the dropper in his hand and muttered to himself. He recalled the medical ninja at the frontline field hospitals, their chakra exhausted and faces filled with fatigue, yet still unable to keep up with the influx of wounded. "Ordinary Healing Techniques work well on flesh wounds, but for internal bleeding, organ trauma, and torn chakra pathways, they act slowly and consume an enormous amount of chakra."
The memories of his two lives intertwined at that moment. His previous life's knowledge of trauma first aid, cellular regeneration, and antibiotic applications from medical school collided and fused wildly with the Medical Ninjutsu he had learned in this life, the human experimentation data he had obtained from Orochimaru, and his in-depth research into White Zetsu Cells and the Uzumaki Bloodline.
"The key is to stimulate the vitality of the