Naruto: I Cultivate Immortal Chakra

Reborn as Senju Natsuhiko, I faced a terrifying reality: the once-proud Senju clan was in decline, my parents gone, and I was forced into ANBU at eight, a mere civilian ninja in a world of monstrous powers. Worse, my inherited 'Senju' chakra was constantly eaten by a mysterious system. Yet, this wasn't a curse, but a bizarre blessing. My unique 'plant-based' system allowed me to absorb vitality from nature, cultivating 'seeds' within me. From these, 'fruits' ripened, granting unimaginable powers—from advanced elemental control to rudimentary Sage Mode. My strength soared, even as my visible chakra dwindled. Now, navigating Konoha's treacherous politics and the chaos of the Third Ninja War's aftermath, I'm forging a new path. My ultimate mission: to not just survive, but to become the true, undeniable BOSS of the entire Shinobi world, starting by claiming the mantle of the Fifth Hokage. But the first hurdle? Surviving an unexpected encounter with the immortal bounty hunter, Kakuzu.