Four days later, June 20th. Nakamori House.
Wu Yu sat cross-legged on the living room carpet, eyes closed as he refined Chakra. Before him lay the scroll Tsunade had given him—the Ageless Everlasting Spring Technique.
The dark red Yin Seal on his forehead had already been released. Its pattern stretched toward the four corners like four tentacles, while bits of Yin Seal Chakra dispersed through all 130 trillion cells in Wu Yu's body, using Yang Release to adjust the state of every single cell.
Even Hagoromo Otsutsuki, revered by the world as the Sage of Six Paths, had not been immortal. He would age when he was meant to age and die when he was meant to die. The only difference was that even after death, when the Chakra nature of his soul shifted from that of the living to that of the dead and he was forced into the Pure Land, he did not become muddled and senseless due to his immense power. Instead, he could exist as a guardian of the Pure Land's eternal order and tranquility. But he was still dead.
Looking across the ninja world, no matter how powerful a person's Chakra was, aging remained unavoidable.
Unless they had ceased to be human in the first place. Like Orochimaru after his reincarnation—somewhere even Wu Yu could not yet discover, Orochimaru had already become a Chakra life-form similar to a Tailed Beast.
Or they could develop a secret technique specifically for preserving youth. Like what Tsunade had done. Tsunade had once maintained her youth merely as a side effect of cultivating the Yin Seal ninjutsu in her younger days, but this Ageless Everlasting Spring Technique had been painstakingly developed specifically for herself and Wu Yu.
Whenever Wu Yu had time these past few days, he practiced according