He Is in the Hokage and Has Already Cultivated to Immortality.

Reborn as Naruto, he accidentally opened the immortal cultivation system. Qi refining, foundation building, golden elixir, Nascent Soul... Every time you go up a level, your life level will change dramatically. "What? You don't know that the Sharingan itself is a formation?" "What? You don't know Amaterasu is a strange fire?" "What? Absorbing natural energy will turn you into a stone statue?" "What? Sasuke and I are gay friends?" "Cough cough cough..." "I am serious about cultivating immortality." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.