Black flames ignited wherever the eye could see, impossible to extinguish.
Dodging Amaterasu wasn't difficult; all it took was avoiding the opponent's gaze.
And with so many coverings around, concealing his figure was simply too easy.
The key issue was that Sasuke still couldn't fully adapt to the physical strain on his body due to Mangekyo Sharingan.
Nearby, black flames were burning everywhere, but Sasuke couldn't hold out much longer.
His eyes hurt painfully!
Sasuke closed his eyes, dropped to one knee, and panted heavily.
"It seems the side effects of the Mangekyo Sharingan are quite severe for Sasuke."
"The power of the Mangekyo Sharingan can't be used indefinitely."
"Unless it's the Eternal Mangekyo Sharingan."
White Zetsu and Black Zetsu, observing the intense battle, had become commentators, completely unaware that Ryujiro was watching them from above.
"Sasuke, that kid."
"He's still too reckless. Using the Mangekyo's abilities without restraint will deplete his chakra completely."
In contrast, Itachi was more astute.
Seeing Sasuke activate Mangekyo Sharingan surprised him, and Sasuke's abilities also caught Itachi off guard.
However, despite all this, what did it matter?
Although Mangekyo Sharingan was powerful, it also brought relative side effects.
Watching the black flames around him, a chill crept into Itachi's heart.
Sasuke's growth had exceeded his expectations.
But this was enough.
Itachi smiled with relief, but he quickly turned back to his usual cold expression as he stepped out.
"Unexpected."
"I didn't think you'd also awaken these eyes."
"Very well, these eyes will restore my sight."
Tsukuyomi!
As Itachi cast Tsukuyomi on Sasuke, his body suddenly trembled, and his eyes gradually became dull.
Tsukuyomi, huh?
Seeing this scene from above, Ryujiro couldn't help but frown.
It seemed Itachi was indeed holding back.
Though Tsukuyomi was powerful, Sasuke, with his own Mangekyo Sharingan, could potentially break it.
In the original anime, Sasuke had already broken Itachi's Tsukuyomi with his three-tomoe Sharingan.
Sure enough, Sasuke's dull eyes regained their luster, though his forehead was drenched in cold sweat, making him look more exhausted.
Itachi, not faring much better, supported himself with one hand on the ground and covered his left eye with the other, staring in shock.
"You actually... broke my Tsukuyomi!"
Itachi was astounded.
Breaking free from the Tsukuyomi wasn't new; the last time he used it on Ryujiro, it backfired.
But now, Sasuke had broken his Tsukuyomi as well.
Was it due to the Mangekyo Sharingan?
"Heh, Itachi, your eyes aren't that great after all."
Sasuke mocked with a cold smile.
After a brief rest, they resumed their fierce battle.
Fireball Jutsu, Phoenix Flower Jutsu, various fire-style jutsus clashed, dazzling to behold.
Sasuke's strength seemed to be pushing Itachi back.
Only Ryujiro knew that Itachi was deliberately holding back for Sasuke.
Given Itachi's abilities he could defeat Sasauke.
Because even if Sasuke had the Mangekyo Sharingan, he had only just awakened his eyes and couldn't fully utilize its abilities.
Moreover, Itachi was still holding his trump card, Susanoo.
"Unbelievable."
"Itachi is actually being pushed back by Sasuke."
White Zetsu exclaimed in surprise.
Black Zetsu, however, looked at Itachi strangely.
Even if Itachi was sick, his strength shouldn't have declined so much.
It seemed that while Itachi outwardly showed a desire to kill Sasuke, in reality, he had no killing intent at all.
Coversely, Sasuke's body was filled with surging killing intent towards Itachi.
Fire Style! Dragon Flame Jutsu!
Sasuke's chakra gathered in his throat, spewing flames shaped like a dragon's head towards Itachi.
Itachi countered with his own fire-style jutsu, but blood trickled from the corner of his eye.
Amaterasu!
Whoosh—boom!
Black flames instantly engulfed the fire-style jutsu.
Amaterasu could incinerate anything, not even water could extinguish it.
That's why, Amaterasu was known as the inextinguishable black flames.
Sasuke saw this and circled around Itachi, but even so, Itachi's black flames instantly burned onto Sasuke's body.
Sasuke screamed in pain, collapsing to the ground.
Compared to the experienced Itachi, Sasuke's tactics were indeed immature.
Moreover, Sasuke hadn't yet created techniques like Kirin due to his recent Mangekyo Sharingan awakening.
Itachi wasn't doing well either, panting heavily, clutching his eyes, his face pale.
At this moment, Ryujiro's gaze also focused on Itachi.
Itachi's condition was deteriorating rapidly.
Ryujiro could sense his weakening life force and his breath rapidly declining.
Itachi was now in a critical condition.
"It seems I'll have to use that."
"Sasuke, let me show you the ultimate power of the Uchiha clan."
Boom!
A terrifying chakra burst forth, forming an orange skeletal structure that rose from the ground.
The interlocking chakra connections making it resemble added flesh, forming a giant several tens of meters tall.
Susanoo, the Uchiha clan's ultimate power, was nearly synonymous with destruction.
Although it wasn't the complete Susanoo, its power was still unimaginable.
Susanoo.
"Oh!"
"What is that!"
White Zetsu exclaimed in awe at the massive Susanoo.
"That is Susanoo, the ultimate power of the Mangekyo Sharingan."
"Now that Itachi has used this, Sasuke should have no chance of winning."
Black Zetsu was all too familiar with Susanoo's power.
"Susanoo, huh."
"Not that impressive."
Sasuke showed a disdainful expression.
Despite only awakening the Mangekyo Sharingan a month ago, through intense training, he had awakened this ultimate power within it.
Violent chakra surged, stabilizing quickly, and a purple Susanoo similar to Itachi's appeared.
This...
Itachi's eyes widened in shock.
At this moment, he realized that his brother was an even greater genius than he had thought.
Sasuke had even mastered Susanoo's power, making Itachi reassess him.
Two towering figures stood there, standing side by side, they seemed like an insurmountable mountain, suffocating all who beheld them.
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