Brother Complex

"What exactly happened... Sasuke, your eyes!"

Itachi Uchiha stared into Satsuki's eyes, his body leaning back slightly—a defensive posture he rarely displayed—he would never lose his composure like this, even when facing a powerful enemy.

"You are... no, you are indeed Sasuke, but this is impossible..."

Itachi Uchiha truly couldn't understand the current situation.

His first suspicion was that the person in front of him wasn't Uchiha Sasuke at all. It was impossible for Sasuke Sharingan have progressed to this level in just a few days.

Those purple and red interwoven patterns, that Tomoe slowly rotating within them—it wasn't the Sharingan, not even the Mangekyo, it was... the Rinnegan?

Itachi Uchiha internally rejected this assessment.

He had seen the Rinnegan in the Akatsuki. The power of those eyes was enough to make a person a god, but the feeling he got from the eyes in front of him was completely different from those Rinnegan.

If Akatsuki's Rinnegan is a bottomless lake, then Sasuke's eyes are an ocean with no end in sight.

Standing on the shore, looking at the vast expanse of water, I had no idea how deep it was, no idea what was hidden inside, and no room for even guessing.

This power was beyond his comprehension.

But... there's one thing he's certain of.

That source of Dojutsu, that aura of chakra, that feeling of blood connection—he was all too familiar with it.

That was Uchiha Sasuke's original essence, the unique chakra fluctuation of his younger brother Uchiha Sasuke.

Itachi Uchiha's Mangekyō Sharingan was telling him an impossible truth: the person before him was none other than Uchiha Sasuke himself.

However, this Sasuke had become so powerful that he couldn't see through him at all.

"Are you doubting my identity, Itachi?"

Satsuki slowly said, "Then let me make this clear. I want to teach you a lesson simply because of your unauthorized decision-making about other people's lives."

With a soft "bang," the Transformation Jutsu on Satsuki was dispelled.

Itachi Uchiha's eyes widened again.

The face in front of me... looks a lot like Sasuke, but it 'Sasuke not quite the same.

The curve of his cheeks was closer to another face he knew all too well— Mikoto Uchiha.

The mother he killed with his own hands. Her face seemed to be a blend of Sasuke and Mikoto's features, creating a look he had never seen before, yet took for granted.

"... You are... Sasuke?"

Itachi Uchiha's voice was somewhat hoarse, "Sasuke from the future... no, from another world?"

His tone was uncertain; even he himself thought the deduction was too absurd, and he began to wonder if he had fallen under some kind of Genjutsu again.

Itachi Uchiha's mind raced, a series of possibilities flashing through his head. What if Sasuke were a girl? What if the child who had always followed him around calling him "brother" wasn't a brother but a sister?

What if the mother had given birth to a daughter instead of a son? That girl would probably look like this when she grew up.

The connection of blood ties cannot be faked.

Uchiha Satsuki was a little unhappy. She looked at Itachi Uchiha's face, which gradually changed from shock to contemplation, and then from contemplation to understanding, and felt somewhat annoyed.

This guy guessed it right so quickly?

After all, Itachi Uchiha was a brother-complex individual with an extremely strong desire for control.

In response to Itachi Uchiha, a half-purple Susanoo.

Purple chakra surged in the night, rapidly coalescing into a massive half-body silhouette around Satsuki's body.

Satsuki stood in the center of Susanoo, enveloped in that purple light, her eyes coldly fixed on Itachi Uchiha opposite her.

This is the second stage of Susanoo. Under the control of Satsuki, the giant purple giant raised his arm, opened his palm, and a huge energy bow appeared out of thin air. The bowstring was drawn, and an arrow formed from chakra was nocked on the bow, with the arrowhead aimed at Itachi Uchiha.

Itachi Uchiha stared at the purple Susanoo opposite him. He didn't have time to think and immediately activated his Mangekyō Sharingan.

A crimson light surged from his eyes, rapidly coalescing into a crimson half-body Susanoo around his body, facing the purple giant across the distance.

When Itachi Uchiha activated his Mangekyo, he felt no discomfort in his eyes at all. This long-lost feeling made him feel somewhat unaccustomed for a moment.

Itachi Uchiha's red Susanoo raised its arm, opened its palm, and a huge Tomoe appeared in its palm.

"Yasaka Beads!"

The red Tomoe flew out of Susanoo's palm and spun towards Satsuki's purple Susanoo.

Satsuki watched the red Tomoe whirling towards her, she gently loosened her grip.

A purple chakra arrow shot from the giant energy bow, heading straight for the red Tomoe.

"Boom!"

The arrow collided with the Tomoe, bursting into a blinding light. The purple arrow was not blocked by the Tomoe —it pierced straight through the center of the red Tomoe like a red-hot iron needle piercing a piece of tofu, shattering the spinning Tomoe into fragments.

Red flame fragments scattered and flew everywhere, but before they could even hit the ground, they were blown away by the shockwaves generated by the purple arrows.

The arrow continued its trajectory without slowing down after piercing the Tomoe, heading straight for Itachi Uchiha's Susanoo.

The difference in power between the two sides was simply too great. The Yasaka Beads couldn't even stop the arrows for a moment.

Itachi quickly activated his Dojutsu, and red chakra surged from the ribs of Susanoo, rapidly covering his entire upper body and forming a thick layer of red armor.

Susanoo progressed from the second stage to the third stage—its entire body is covered in armor, greatly increasing its defensive capabilities. This is a form that he has rarely needed to use in past battles.

"Boom!!!"

The purple arrow slammed into Itachi Uchiha's Susanoo. The purple chakra and the red armor collided violently in mid-air, and the shockwave from the explosion spread in all directions, blowing the surrounding trees to the side and hurling layers of soil from the ground.

Itachi Uchiha's Susanoo enveloped in purple light, and his red armor was constantly cracking amidst the explosions, only to be continuously filled and repaired by new chakra.

Itachi Uchiha covered his eyes in pain.

It wasn't the pain from overusing Dojutsu, but rather the intense vibration of his Susanoo being attacked, which was transmitted directly to his eyes through the chakra link, like a heavy punch to his eyeballs.

The third form was completely insufficient. That thick layer of red armor was utterly ineffective against Satsuki's attacks.

Itachi Uchiha gritted his teeth and released his hands from his eyes. He took a deep breath, and the light in his Mangekyō Sharingan became even more intense.

There was no other way. He had no choice but to once again unleash his Dojutsu, pushing the output of the Mangekyō Sharingan to its absolute limit.

Red chakra surged wildly from his body, unstoppable like a flood bursting its banks. Susanoo began to expand under the infusion of chakra, rapidly growing its lower body from its half-body form, transforming from a few-meter-tall half-giant into a complete giant tens of meters tall.

The red armor became thicker and more exquisite, and a pair of huge wings spread out from its back. The entire Susanoo exuded a solemn and oppressive aura.

This is the complete form of Susanoo. It's a form that Itachi Uchiha almost never used.

Over the years, his terminally ill body simply couldn't withstand this level of Dojutsu consumption. Every time he tried to use the Perfect Susanoo, it would put a huge burden on his body and even directly threaten his life.

But now, [Amaterasu Ling] has suppressed all the diseases and hidden injuries in his body. His body feels lighter than ever before, and his Dojutsu is more abundant than ever before. He can use the full power of these eyes without any scruples.