The Six Red Yang Formation, Desperate Straits

Obito raised both hands at once, extending three fingers on each. A red magic circle appeared beneath his feet and spread outward in all directions with him at its center, moving at an unbelievable speed. Six Six Paths Black Receivers wreathed in red flames shot from his palms toward the six corners of the battlefield, carving six crimson arcs through the air.

When Minato's kunai was still five centimeters from Obito's left flank, a red wall of fire appeared out of nowhere before him. The instant the kunai's tip pierced the crimson flames, the Sage Art Chakra on its blade collided with the barrier in a piercing blast—but the barrier did not budge.

Tobirama's Explosive Tag flames were swallowed by the red fiery barrier, without even an explosion managing to ring out.

Naruto's two Rasenshuriken simultaneously struck an invisible wall less than a meter from Obito—six Black Receivers had landed, and a transparent crimson hexagonal pillar barrier of flame enveloped the center of the entire battlefield.

Six Red Yang Formation.

The strongest barrier ninjutsu known, an enhanced version of the Four Red Yang Formation. Cast by the Ten-Tails' Jinchuriki with the power of the Six Paths, it used six Six Paths Black Receivers wreathed in red flames to erect an enormous crimson hexagonal pillar barrier. The red flames attached to the barrier served as both a physical and Chakra barrier. Anything that touched it—whether ninjutsu, weapons, or human bodies—would instantly be incinerated and disintegrated by the flames.

The six Black Receivers nailed themselves into the ground at six corners of the battlefield, and crimson shockwaves burst from each point of impact. Black energy, threaded with thin patterns of red flame, rose around the entire battlefield before finally closing together hundreds of meters overhead, trapping every member of the Shinobi Allied