Looking at Isamu's eyes, Indra was slightly surprised.
"I didn't expect you to have awakened the Eternal Mangekyō Sharingan as well. It seems this battle is becoming more and more interesting."
As he spoke, the corners of Indra's mouth curled upward. Purple Chakra erupted from his body, the ground beneath his feet cracking inch by inch. The solidified Chakra generated a violent storm.
"As expected of Indra. Such powerful Chakra is truly rare. But I'm no pushover either."
Isamu narrowed his eyes as the deep-blue Chakra within his body exploded outward. His presence was not inferior to Indra's in the slightest.
At this moment, he possessed only half of his original strength, placing him roughly on the same level as Ashura. If he were fully restored, Isamu was confident he could completely overwhelm Indra.
The two released their Chakra without restraint.
Their auras and storms collided continuously, creating fierce winds throughout the entire basin. Dust filled the air, and the clash of their Chakra produced sharp crackling sounds.
"Such powerful Chakra!"
"That newcomer isn't simple at all!"
The spectators were stunned by Isamu's aura.
Originally, they had assumed Indra would defeat him in only a few moves. Now, however, it was obvious that things would not be so straightforward.
At the same time, they were grateful they hadn't recklessly entered the basin. If they had, the pressure from the two combatants alone might have crushed them.
"Get ready, Isamu! Here I come!"
Indra's pupils contracted.
His right hand instantly drew the longsword at his waist, and he transformed into a streak of light as he charged toward Isamu.
"Come, Indra. Let me experience your strength for myself!"
Isamu moved his right hand behind his back, out of Indra's line of sight.
A black Truth-Seeking Orb appeared in his palm and quickly transformed into a black longsword.
The power of the Six Paths was his greatest secret. He had no intention of revealing it to Indra.
Holding the black blade, Isamu focused entirely on the incoming attack.
Clang!
Indra's white sword collided with Isamu's black sword.
Violent force exploded outward from the point of impact.
The ground shattered, and chunks of rock were blown away by the surging Chakra.
"Such incredible strength!"
Isamu's pupils shrank.
Looking down, he realized that he had been pushed back nearly three meters by Indra's charge.
Even though he wasn't at full strength, he still possessed Six Paths-level power. Being forced back this far was enough to show just how terrifying Indra's physical strength truly was.
He raised his Chakra to its limit in an instant.
"Indra, let me return the favor!"
"Sword Art: Peerless Monstrous Strength!"
With the enhancement of Monstrous Strength, Isamu swung his sword with overwhelming force.
A compressed air cannon shot toward Indra.
"What is this?!"
Indra had never seen such a technique before.
Caught off guard, he was blasted backward dozens of meters before finally stabilizing himself.
His eyes narrowed.
"So he uses his immense physical strength to create an attack similar to an air cannon… Isamu, your techniques are truly unusual."
"The battle has only just begun, Isamu. Don't let your guard down!"
Gripping his white sword tightly, Indra charged once more.
Those words were directed at Isamu, but they also served as a reminder to himself.
The opponent before him was no ordinary warrior.
Underestimating him would only lead to disaster.
"I never lower my guard in battle."
Watching Indra rush forward again, Isamu rapidly formed hand seals.
"Fire Release: Majestic Destroyer Flame!"
A sea of fire spanning hundreds of meters surged forward, instantly blocking Indra's path.
"What is that?"
"Ninjutsu?!"
"How is that possible?!"
The spectators were thrown into complete shock.
In this era, Ninjutsu required extremely complex hand seals.
Even basic techniques often required more than ten seals.
Powerful techniques sometimes demanded dozens.
On a real battlefield, there was rarely enough time to perform such lengthy sequences.
As a result, Ninjutsu was mainly used for ambushes or large-scale warfare.
No one would normally use it in a duel.
Yet Isamu had unleashed a massive Fire Release technique after only a handful of hand seals.
It was unbelievable.
The sea of flames swallowed Indra whole.
Scorching heat spread across the basin.
However, Indra remained unharmed.
A twenty-meter-tall purple skeletal Susanoo had appeared around him, effortlessly blocking the flames.
An area-of-effect technique like Majestic Destroyer Flame simply couldn't penetrate Susanoo's defense.
"The initial form of Susanoo…"
Isamu frowned slightly.
With Indra's level of power, he shouldn't have needed Susanoo to defend against something like Majestic Destroyer Flame.
Something felt strange.
"Isamu."
Indra suddenly spoke.
"Was that Fire Release Ninjutsu just now?"
"Yes."
Isamu nodded.
"It was Ninjutsu. Why?"
Indra's expression immediately changed.
"Remarkable."
He stared at Isamu with obvious curiosity.
"That technique only required six hand seals."
"How did you accomplish that?"
"How did I accomplish it…"
Isamu's expression became somewhat strange.
At that moment, he remembered the history of Ninjutsu development.
According to legend, when Indra first invented hand seals, Ninjutsu was incredibly cumbersome. Powerful techniques often required dozens of seals.
Because of this, Taijutsu remained the primary combat method of the era.
Over countless generations, later shinobi continuously refined and simplified these techniques, eventually creating the streamlined hand-seal systems used in Isamu's era.
To Indra, however, seeing such a powerful Fire Release technique performed with only six seals was nothing short of miraculous.
"Well…"
Isamu scratched his cheek.
"I just simplified and improved the hand seals a little."
"It seemed like a waste for such powerful Ninjutsu to be unusable in one-on-one combat."
"Simplified the hand seals?"
Indra was stunned.
As the creator of the hand-seal system, he understood better than anyone how difficult such a feat truly was.
To outsiders, reducing a few hand seals sounded simple.
To him, it was nearly impossible.
Even he had never successfully achieved something like that.
Yet the man standing before him had done it.
This guy…
Was an absolute genius.
If Isamu knew what Indra was thinking, he would probably laugh himself unconscious.
The truth was that he had absolutely no idea how to improve hand seals.
He simply didn't know how else to explain it.
So he casually claimed the achievement as his own.
What he hadn't expected was that Indra would immediately regard him as a peerless genius.
The misunderstanding had become enormous.
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