The black Chakra Blades Naruto created by fusing Yin and Yang Nature Chakra were still far inferior to the black rods Nagato produced using the Rinnegan.
Naruto's ability was still within the realm of Chakra Shape Transformation. To put it simply, it was similar to Sasuke's Lightning Release: Chidori Sharp Spear from the original work.
However, while Sasuke's Chidori Sharp Spear was a Shape Transformation of the Chidori Current, Naruto's technique was a Shape Transformation of the Tailed Beast Ball.
By stabilizing the Yin and Yang Nature Chakra in a 2:8 ratio within the Tailed Beast Ball and then performing Shape Transformation, Naruto achieved this feat. It looked incredibly difficult, and in reality, it was no simple task.
Naruto was able to accomplish this because he was already highly skilled in using both Yin and Yang Nature Chakra.
The Sharingan itself was a bloodline ability rooted in Yin Nature, and the Susanoo represented the pinnacle of Yin Nature power. Meanwhile, the Uzumaki Clan was renowned for their immense vitality, which naturally meant their Yang Nature Chakra was strong. Combined with the vast Yang Chakra of the Nine-Tails, Naruto's proficiency in this area was equally impressive.
Moreover, Naruto had begun researching and applying Yin and Yang Nature Chakra long before this.
Ōtsutsuki Hagoromo quickly adjusted his mindset, his serious expression now tinged with a hint of pride.
"Naruto, I must admit, your talent is truly exceptional."
Given the power Naruto had displayed so far, the question was no longer whether Hagoromo could defeat him.
Instead, it was whether Hagoromo could even preserve the small amount of Chakra he had left in his current body. Although the Chakra he had entrusted to Jiraiya's body was minimal, for someone who had been dead for nearly a thousand years, it was still incredibly precious.
The tables had turned.
"Otsutsuki Hagoromo, it seems you've misunderstood something."
Naruto controlled his Susanoo to pull its limbs out of the ground, his voice icy. "If I recall correctly, to evolve the Mangekyo Sharingan into the Rinnegan, one needs Six Paths Chakra, right?"
Hearing this, Hagoromo's gaze sharpened slightly.
"Otsutsuki Hagoromo! Now, you are my prey!"
Naruto let out a roar, like a wild beast, as the crimson Nine-Tails Chakra erupted from his body like flames, burning fiercely.
He swung the two black Chakra Blades in his tail-hands, the blades slicing through the air as if they could tear apart the very fabric of space, like lightning cutting through the night sky, aiming straight for Hagoromo.
Naruto didn't know any advanced sword techniques, but he understood one thing: a sword only needed to be fast, accurate, and ruthless.
Each swing of his Chakra Blades carried a sharp whistling sound, as if the air itself was being torn apart, creating swirling vortices of wind. His movements were simple yet powerful, devoid of any unnecessary flair, radiating pure killing intent.
Facing Naruto's assault, Hagoromo adopted the same approach.
His current body was too weak, and the amount of power he could wield was severely limited. He couldn't even use Truth-Seeking Balls, and his Susanoo was only about 100 meters tall.
Hagoromo had no choice but to control his blue Susanoo, wielding his Chakra Sword to engage Naruto in close combat.
As Naruto attacked, the Chakra Blades carried terrifying gusts of wind, surging like a storm.
He continuously swung his two blades at Hagoromo, each strike imbued with immense power and killing intent, as if he wanted to cleave Hagoromo in two.
Yet, every time, Hagoromo managed to block Naruto's attacks with precision.
Even when Naruto attacked with multiple tails simultaneously, Hagoromo could still defend against them. Not only that, but he could also counterattack while blocking Naruto's strikes.
This wasn't just due to combat experience, it was also a result of the Rinnegan's terrifying perceptive abilities.
In just a short time, killing intent filled the air, and the surroundings became tense and oppressive.
The clash of their sword energies produced deafening roars, and the shockwaves of their power caused Mount Myoboku to tremble.
As time passed, the battle continued for hundreds of rounds. Surprisingly, despite Naruto being the aggressor, he was the one who ended up more injured.
His Susanoo had suffered significant damage, with large sections of it now broken.
The once-impenetrable Susanoo armor now had multiple gashes, revealing the orange fur of Naruto's full Nine-Tails Transformation beneath. Although there were no deep cuts into his flesh, it still didn't truly harm him.
Naruto's incredible regenerative abilities allowed his wounds to heal rapidly.
The torn and exposed flesh was visibly repairing itself, and even the Susanoo was slowly reforming.
On the other hand, Hagoromo appeared relatively unscathed. His body showed no major injuries, with only a few cuts visible on his Susanoo's armor.
While these wounds seemed minor compared to Naruto's, they showed no signs of healing, and the entire Susanoo was becoming increasingly translucent.
It seemed difficult to maintain.
Both Hagoromo and Naruto noticed this and understood the reason.
Hagoromo was running out of Chakra.
Naruto had realized this early on, which was why he chose to engage Hagoromo in high-intensity, fast-paced close combat.
He even adopted a strategy of trading injuries to force Hagoromo to expend his Chakra rapidly.
Naruto knew that evolving the Eternal Mangekyo Sharingan into the Rinnegan required more than just the fusion of Asura and Indra's Chakra.
The key was the Six Paths chakra that emerged after the fusion of Asura and Indra's Chakra.
In the original work, both Madara and Sasuke had only awakened the Six Paths Chakra when they were on the brink of death.
And now, the purest Six Paths Chakra in the world was right in front of him.
After absorbing five Mangekyo Sharingan, Naruto's Ocular Power had already reached its peak.
So, he didn't need much of Hagoromo's chakra, and just a trace would be enough to evolve his Sharingan.
Hagoromo slashed at Naruto's chest again, cutting through the armor and slicing open the flesh beneath.
Blood spilled out.
But Naruto's only paused for a moment before he charged forward again.
The flames in his eye sockets burned even brighter.