Naruto, Sasuke, and Six Paths Obito

At the other end of the high ground, Sasuke stood atop the head of Perfect Susanoo. Under his will, the purple Chakra armor slowly contracted, compressing from a giant body hundreds of meters tall into a smaller, denser form—less than fifty meters in height, yet with three times the Chakra density of before. Purple-black lightning flowed through the diamond-shaped patterns across the armor's surface.

But his attacks were still ineffective.

Susanoo's katana struck the God Tree's roots. The blade cut into the surface, but after penetrating less than half a meter, it was stopped by purple-black Chakra. What seeped from the wound was not sap, but a purple-black substance harder than metal and more resilient than rubber. It clamped down on the katana's blade, and no matter how hard Susanoo pulled, it could not wrench it free.

Sasuke's Sharingan spun rapidly, allowing him to see the Chakra flow within the roots with perfect clarity. The purple-black Chakra formed a flawless defensive cycle inside the roots—whenever the exterior was attacked, the internal Chakra rushed toward the point of impact, raising its defensive strength within fractions of a second to a level capable of withstanding any physical attack.

Ninjutsu was ineffective against Obito, and it was ineffective against the God Tree as well. This was the absolute defense granted to them by the power of the Six Paths. Unless they attacked with Sage Art, no ninjutsu could break through that barrier.

Sasuke's expression darkened.

Before the God Tree, his Susanoo was like a dull blade. Every slash could only leave a shallow dent in the bark, and those dents healed in less than a second. He had already tried katana strikes, Yasakani Magatama, Susanoo's bow and arrows, and even attempted to use his Rinnegan to guide the God Tree's Chakra into another