Naruto's Ancestors... Fire Cloud Cave

The Ōtsutsuki God fell silent for a moment. Then he laughed. The sound came from a higher dimension, steeped in condescending pity.

"An ant can struggle all it likes. It's still an ant. Twelve hundred million Causality Threads? I'll sever them one by one."

He poured all his higher-dimensional divine power into tearing open the river of time, then fought his way upstream across endless ages.

His true form became a dark red streak of light, broke through layer after layer of temporal barriers, and shot off in one direction.

Naruto stood where he was, watching the light disappear.

"Damn, the Ōtsutsuki God's got guts. Good... I like guts. Go on. Even if you don't run into that Demon Ancestor, you might meet one of my own ancestors!" he murmured. "Let's see who my forebears were."

At the far end of the river of time lay a prehistoric land.

After an immense struggle, the Ōtsutsuki God finally reached the ancient age of Naruto's Blue Star ancestors.

He stood above the wilderness, his dark red light illuminating the entire land.

Below stretched mountain ranges and dense primeval forests, with prehistoric beasts appearing here and there.

Those beasts were more than ten times the size of modern Ninja World summoning beasts. Yet the moment they sensed the Ōtsutsuki God's presence from afar, they flattened themselves against the ground and trembled.

"This brat's ancestral roots go remarkably far back." The Ōtsutsuki God swept his divine gaze across the land, his face full of disdain. "Let me see what sort of lowly creatures these otherworldly mortal ancestors are, to have produced a variable that shakes the heavens."

His gaze pierced the prehistoric mist and settled on a valley.

It was a small valley, hemmed in by mountains on three sides and bordered by water