The dim space seemed to stretch on without end, its floor formed from flowing water. Naruto Uzumaki stood on the surface, his reflection mirrored beneath him, and looked around the unfamiliar surroundings in bewilderment. Beside him stood the cool, handsome Sasuke Uchiha.
"Sasuke, why are you here too?"
An elderly figure in white robes hovered cross-legged in midair and explained, "This is an alternate dimension created through genjutsu. You are cut off from the outside world."
At the sight of the Sage of Six Paths' aged, frightening face, Naruto Uzumaki froze for a moment before his expression filled with terror. "Are you... Grandpa Shinigami!!!?"
"No. My name is Hagoromo Otsutsuki, founder of ninshu. The people of this world once called me the Sage of Six Paths."
Sasuke Uchiha stared at the Sage of Six Paths' Rinnegan and added, "The founder of ninshu, and the common ancestor of both the Uchiha Clan and the Senju Clan."
The Sage of Six Paths gave Sasuke Uchiha a long look, a trace of melancholy and loss crossing his face. "You are very perceptive. As expected of Indra's reincarnation."
"Indra?" Naruto Uzumaki looked puzzled.
"Yes. I had two sons. My eldest was named Indra, and my youngest was named Asura. They were also the ancestors of what you call the Uchiha Clan and the Senju Clan. Their conflicting ideals led them to fight one another. After their deaths, their chakra persisted, reincarnating again and again to continue their battle for nearly a thousand years.
"In the previous generation, Indra's reincarnation was Madara Uchiha, while Asura's was Hashirama Senju. In this generation, Indra and Asura have reincarnated as you two, Sasuke Uchiha and Naruto Uzumaki."
Naruto Uzumaki stared at the Sage of Six Paths in disbelief. "Grandpa, are you saying I'm Asura's reincarnation?"
"Rather than saying