Mei Terumi, the Fifth Mizukage

In the bustling hall, Sasuke's gaze was drawn to a figure— Danzō. However, just as he was about to step forward, a hostile voice came from behind. "You must be Sasuke! I've heard so much about you!" Sasuke turned around and found himself entangled with Mei Terumi, the Fifth Mizukage, who had a Mei Terumi -seated grudge against Akatsuki.

Mei Terumi possesses two Kekkei Genkai, Lava Release and Boil Release, making her extremely powerful. Sasuke, after a series of fierce battles with many powerful opponents, had very little chakra left, and the excessive use of Susanoo had caused every cell in his body to ache, making him unable to withstand the Mizukage's ninjutsu attacks.

Just as Sasuke was in dire straits, White Zetsu suddenly appeared and shielded him from the Mizukage's fatal blow. Sasuke seized the opportunity to escape, but he was exhausted and collapsed to the ground.

However, the danger was not over. Just as Sasuke was catching his breath, the Third Tsuchikage, Ōnoki, suddenly appeared in front of him and unhesitatingly used Dust Release. This was an extremely powerful ninjutsu, and if Sasuke were hit, his life would likely be in danger.

Just when everyone thought Sasuke was doomed, a mysterious figure appeared like a ghost. The "Masked Man" appeared before everyone with Sasuke, who had fainted due to excessive chakra consumption. Then, he instantly transported Karin and Sasuke to another dimension, allowing Karin to heal Sasuke's injuries.

The Masked Man stood before the four Kage—Wind, Lightning, Earth, and Water—revealing the full scope of the "Eye of the Moon Plan" and threatening them to hand over the Jinchūriki of the Eight-Tails and Nine-Tails. Under the Masked Man's coercion, the four Kage wavered somewhat, but still did not change their resolve.

Finally, seeing that the four Kage refused to yield, the "Masked Man" announced the official start of the Fourth Shinobi World War. As soon as he finished speaking, the entire venue was enveloped by a powerful force, and an unprecedented battle was about to erupt.

Just then, the "Masked Man" suddenly appeared in front of Danzō, who was fleeing the venue. Upon seeing this, Danzō's two guards immediately rushed forward and engaged in a fierce battle with the "Masked Man." However, their strength was far inferior to the "Masked Man," and they were defeated in no time.

The Masked Man easily defeated Danzō's guards and then released Sasuke from the alternate dimension. As soon as Sasuke appeared, he questioned Danzō about the truth regarding Itachi. Danzō with Sasuke's questioning, Danzo finally revealed that Itachi had chosen to become a traitor in order to protect the village.

Upon hearing Sasuke's anger flared instantly. He couldn't accept this fact and believed that Danzō was the real traitor. Enraged, Sasuke unleashed his Susanoo, tightly gripping Danzō in his hand.

However, just when Sasuke thought he had killed Danzō suddenly reappeared behind him. Sasuke was astonished; he couldn't understand how Danzō could "come back to life."

Danzō looked at Sasuke smugly, telling him that he possessed a special ninjutsu that allowed him to repeatedly "revive" after suffering fatal wounds. Sasuke angrily continued his duel with Danzō, his attacks as fierce as Gale, the black flames of Amaterasu, and the massive shadow of Susanoo blotting out the sky. However, no matter how ferocious he was, Danzō always managed to "revive" at the last second and counterattack with astonishing speed.

A sense of defeat welled up in Sasuke's heart, but he did not give up. In the midst of the fierce battle, he gradually observed some of Danzō's subtle movements and reactions, which became clues for him to find Danzō's weaknesses.

Finally, Sasuke discovered a weakness in Danzō's defenses. Without hesitation, he unleashed Susanoo once more, pushing its power to its limit. The massive Susanoo, like a mountain, crashed down upon Danzō.

This time, Danzō seemed truly defeated by Sasuke's attack. His body crashed heavily to the ground, kicking up a cloud of dust. Sasuke breathed a sigh of relief, thinking the battle was finally over.

However, just as he relaxed his guard slightly, Danzō suddenly got up from the ground. Although his body was badly mangled, covered in wounds and blood, his eyes were filled with murderous intent, as if he had not been affected by the fatal blow just now.

Danzō, Danzo unleashed a mysterious Curse Mark, and a black light instantly enveloped Sasuke. Sasuke felt as if his body was tightly bound by a powerful force, making him completely unable to move.

At this critical moment, the image of Itachi suddenly flashed through Sasuke's mind. He remembered what Itachi had once told him, and the promise they had made.

A powerful force surged within Sasuke's body, Susanoo evolved once more. Its appearance became even more ferocious, and its power even greater. Using all his strength, Sasuke finally broke through Danzō's Curse Mark.

The situation reversed instantly, Sasuke regained the initiative. He wielded Susanoo and launched a new attack on Danzō. The true nature of Danzō's immortality gradually came to light during this fierce battle.

According to the "Masked Man," it was an extremely terrifying forbidden technique, feared even by the Uchiha Clan, who called it "Izanagi." This forbidden technique could transform real-world injuries into illusions, giving people a chance to be reborn when they were on the verge of death.

After a thrilling and arduous battle, Sasuke displayed his astonishing talent for genjutsu and his combat skills. He skillfully used genjutsu to mislead Danzō, thus defeating him in one fell swoop.

However, Danzō, on the verge of death, did not give up easily. In his desperate situation, he suddenly used his last resort, taking Karin hostage. Faced with this unexpected turn of events, Sasuke's heart was blinded by hatred, and he lost his reason.

Driven by rage, Sasuke unleashed the Chidori Sharp Spear without hesitation. This powerful technique was capable of piercing an enemy's vitals. However, unexpectedly, Sasuke's Chidori Sharp Spear not only pierced Danzō's body but also mercilessly pierced Karin's vitals.

Karin's blood splattered on the ground; her life vanished in an instant. Sasuke watched the horrific scene before him, his hatred growing ever stronger, yet he was also overwhelmed by endless regret.

Before his death, Danzō even attempted to activate the "Reverse Four Symbols Seal" to seal the "Masked Man" and Sasuke together. However, he had very little power left, and this attempt ultimately failed.

Sasuke finally defeated Danzō, but his heart was filled with pain and confusion. Just then, Sakura, Kakashi, and Naruto arrived at the scene, and the members of Team 7 were reunited. Sasuke's Chidori and Naruto's Rasengan clashed once again. In the spiritual world, Naruto and Sasuke stood facing each other, both appearing very serious. Although Naruto tried his best to persuade Sasuke remained unmoved, his determination as hard as steel.

However, after a fierce verbal battle, Sasuke finally had no choice but to agree to Naruto's challenge. He knew very well that this life-or-death battle was unavoidable, and deep down he had always longed for a real showdown with Naruto to prove his strength.

Immediately afterward, Sasuke turned and left with the Masked Man, leaving Naruto looking utterly astonished. Back in the real world, Sasuke suddenly felt his vision deteriorate significantly, and things in front of him became blurry. He knew perfectly well that this was a side effect of his frequent use of the Mangekyo Sharingan.

In order to restore his sight and gain greater power, Sasuke, after careful consideration, resolutely decided to follow the advice of the "Masked Man" and transplant Itachi's eyes. With the "Masked Man's" meticulous assistance, Sasuke successfully completed the eye transplant surgery.

As Sasuke slowly opened his eyes, a surge of powerful ocular energy erupted from them like a volcanic eruption. This immense power instantly filled his entire body, as if it would tear him apart.

After a fierce collision and fusion of eye powers, Sasuke's eyes finally completed their final transformation, successfully upgrading to the Eternal Mangekyo Sharingan.

With his newfound power, Sasuke's eyes grew even colder and more resolute. Without hesitation, he raised his sword and instantly slashed the White Zetsu's true form, which had been watching him. The White Zetsu's body was torn apart in an instant, black blood splattering everywhere, landing on Sasuke's face, but he paid no heed, simply watching expressionlessly as the White Zetsu's corpse slowly collapsed.

Having accomplished all this, Sasuke a deep breath, then turned around, ready to step onto the battlefield. His steps were firm and powerful, as if the whole world could not stop him. He was going to face his former best friend— Naruto.

On his way to the battlefield, Sasuke was filled with a mix of complex emotions. He didn't know what would happen when he saw Naruto, nor did he know the outcome of the battle. But he knew that, no matter what, he had to face it all.

As Sasuke walked, he suddenly saw a familiar figure. It was Itachi, Edo Tensei! Sasuke's heart skipped a beat, and he immediately stopped, staring intently at Itachi's back.

Itachi's figure loomed in the distance, like a ghost. Sasuke hesitated for a moment, but ultimately decided to follow. He quietly followed behind Itachi, keeping a distance to avoid being discovered.

Sasuke's footsteps were very light, almost making no sound. But Itachi seemed to sense something; he suddenly stopped and turned around. Sasuke, seeing this, also stopped immediately and stood face to face with Itachi.

The atmosphere became unusually heavy for a moment. Neither of them spoke, simply staring at each other in silence. After a while, Sasuke finally spoke, "Why were you Edo Tensei? What is your purpose?"

Itachi's eyes remained cold as he looked at Sasuke and slowly said, "My purpose is to stop the Edo Tensei. It is an extremely evil ninjutsu that will bring immense disaster to the world."

Sasuke was moved by what he heard. He recalled the past, and Itachi's teachings and care for him. He knew that Itachi had always been a righteous person, and he would never stand idly by while such evil ninjutsu ran rampant.

"I'm willing to help you," Sasuke said, "But I have one condition. You must tell me everything I want to know."

Itachi agreed to Sasuke's request, but he also told Sasuke that to know the truth, he must first defeat Kabuto Yakushi. Only then could he truly understand everything.

In the fierce battle, the two brothers worked closely together, their tacit understanding seemingly reawakened. Their movements were as natural as flowing water, every attack and defense perfectly timed, their coordination seamless.

After a fierce battle, Itachi finally unleashed his forbidden technique— Izanami. This move completely subdued Kabuto, preventing his escape. Faced with the immense power of Izanami, Kabuto was forced to reveal the method to undo the Edo Tensei.

With the removal of the Edo Tensei, the chaotic battle situation on the battlefield, caused by Kabuto's manipulation of the Impure World army, was finally brought under control. The souls of those who had been reincarnated began to slowly ascend to heaven, returning to their original world.

Itachi watched all this with a mix of emotions. He knew that this battle wasn't just about victory, but also about making Sasuke understand certain things. So, he told Sasuke everything he knew about the Uchiha Clan massacre, as well as his true thoughts, without reservation.

Itachi admitted that he had made some wrong decisions because he did not believe in Sasuke's strength and will, which led to Sasuke leaving Konoha. But now, he chooses to believe in Sasuke and believes that he has the ability to change the fate of the Uchiha Clan.

Finally, Itachi said to Sasuke the words he had kept hidden deep in his heart, "No matter what path you choose in the future, I will always love you deeply." These words contained Itachi's endless love and expectations for Sasuke, and they also made Sasuke feel the warmth of his older brother.

Itachi's soul slowly ascended to the heavens, his figure gradually disappearing from Sasuke's sight. Sasuke gazed in the direction Itachi had gone, his heart filled with complex emotions. His conversation with Itachi had given him new insights into many things, and he began to rethink, "What is a clan? What is a village? What is a ninja?" These questions, which once seemed simple, had now become so vague.

Just as Sasuke was lost in thought, Suigetsu Hozuki and Jugo suddenly appeared before him. They held a secret scroll they had accidentally found at Orochimaru's base, which seemed to contain important information. Sasuke took the scroll and carefully opened it, but the words and images inside left him feeling bewildered.

However, Sasuke was not deterred by the difficulty. He decided to use the scroll to resolve the doubts in his heart. He recalled the Evil-Sealing Method Kakashi had used on him in the past, a sealing spell that could prevent the corruption of evil forces. Sasuke thought that if he could reverse the hand seals, he might be able to break the seal.

After some attempts, Sasuke finally succeeded in using the Evil-Sealing Release. As the seal was released, a powerful force surged from Sasuke's body. This force resonated with the Curse Mark on Anko Mitarashi's body, and suddenly, Orochimaru's figure emerged from Anko's body.

After Orochimaru's resurrection, he was quite surprised by Sasuke's actions. Sasuke explained his purpose to him and expressed his hope that Orochimaru could help him find answers about his clan, village, and ninjas. After a moment's thought, Orochimaru decided to embark on this journey to find the truth with Sasuke.

So, Sasuke set off with Suigetsu Hozuki, Jugo, and Orochimaru. They traversed dense forests and crossed treacherous mountains, encountering countless hardships along the way. During this process, Sasuke continuously learned and grew, and his strength gradually increased.

Finally, they arrived at a mysterious place—the battlefield of the Fourth Shinobi World War. Here, Orochimaru discovered an Uzumaki Clan Storage Hall, containing many precious items. Among them, a Death God Mask caught Orochimaru's attention.

Orochimaru picked up the mask and examined it closely. He discovered that the mask possessed a special power, allowing it to establish a connection with the Death God. Without hesitation, Orochimaru cut open his abdomen and placed the mask inside. Instantly, a powerful suction force emanated from the mask, drawing out the soul that had been swallowed by the Death God.

Sasuke sneered, seemingly unconcerned by Naruto's words. "I've decided to follow Orochimaru; he can give me even greater power." His words revealed a thirst for power and disdain for Konoha.

Naruto felt a pang of pain in his heart. He couldn't understand why Sasuke would choose to leave the village to follow the evil Orochimaru. But he knew that, no matter what, he couldn't let Sasuke leave like this.

"Sasuke, no matter what, I will not let you leave the village." Naruto gritted his teeth and rushed towards Sasuke without hesitation. He was extremely fast, like a bolt of Inazuma, instantly closing the distance between him and Sasuke.

Sasuke, Sasuke's lips curled up slightly, revealing a disdainful smile. He quickly dodged Naruto's attack, while his Kusanagi Sword stabbed towards Naruto like a venomous snake.

In an instant, sword light flashed Mars flew. Naruto and Sasuke's figures intertwined in the Valley of the End, unfolding a breathtaking battle.

At first, Sasuke gained the upper hand with the power of the Curse Mark. His attacks were as fierce as Zhou Yu, leaving Naruto somewhat overwhelmed.

However, Naruto was not Sasuke's powerful aura. He clenched his teeth, and his muscles trembled slightly from the exertion. He continuously activated the Nine-Tails' power within him, as if he wanted to release all of it.

As time passed, the power of the Nine-Tails within Naruto finally began to erupt like a volcano. The Nine-Tails- Tails chakra that had been sealed within him now blazed around his body like a burning flame. Naruto felt this powerful surge, and his attacks became increasingly fierce, each punch and kick containing boundless power.

Sasuke was startled by what he saw. He had thought he knew Naruto well enough, but now he realized that Naruto could unleash such powerful energy. However, Sasuke did not back down. He quickly enhanced his Sharingan, maximizing its power.

With the Sharingan's enhancement, Sasuke's attacks became even more precise and deadly. Each of his moves was as swift as Inazuma, leaving Naruto struggling to keep up. Sasuke's speed and strength had reached an astonishing level, and his attacks rained down on Naruto like Zhou Yu.

However, just when Sasuke thought he had victory in the bag, the Nine-Tails' chakra within Naruto suddenly underwent a strange change. The chakra, which had been burning like flames, suddenly surged out like a raging torrent, forming a huge tail around Naruto's body.

The tail seemed to possess a life of its own, dancing freely in the air. Each swipe brought a Gale, and its powerful aura sent chills down one's spine. The power it contained far exceeded Sasuke's expectations, like an unstoppable torrent.

Seeing this, Naruto roared, his voice exploding in the air like thunder. With this roar, the power within him surged out like a volcanic eruption, instantly reaching an unprecedented height. His attack, like a surging wave, swept towards Sasuke with overwhelming force.

Sasuke off guard by Naruto's attack, Sasuke's body flew backward through the air like a kite with a broken string. His legs struggled desperately in mid-air, trying to steady himself, but Naruto's strength was simply too great. His body was still involuntarily pushed backward, looking precarious, as if he might fall from the sky at any moment.

However, Sasuke was not defeated by Naruto's attack. Just as he was about to hit the ground, he entered Curse Mark state without hesitation. In an instant, his body underwent an astonishing transformation. A layer of black feathers covered his body like Armored Titan, making him look like a fierce eagle. His eyes also flashed with a scarlet light, a gaze full of killing intent, as if he wanted to tear everything in front of him apart.

At the great waterfall of the Valley of the End, the two unleashed their ultimate techniques. Naruto entered his Nine-Tails form, his red Rasengan Shine with dazzling light, seemingly containing boundless power. Sasuke, on the other hand, entered his Curse Mark state, his black Chidori radiating a chilling aura in the darkness.

These two powerful ninjutsu met in mid-air, instantly creating a fierce collision. The red Rasengan and the black Chidori intertwined, forming a dazzling light that seemed to envelop the entire world.

In the stalemate, Sasuke's Chidori suddenly broke through the Rasengan's defense and struck Naruto directly. However, Naruto was not defeated by this attack. At the last second, he used the Rasengan to cut a crack in Sasuke's headband.

In that instant, the collision of the two powerful ninjutsu created a massive explosion. The force of the explosion was like a landslide, shaking the entire Valley of the End to the point of collapse. The waterfall's water was hurled dozens of meters high, forming a huge cloud of mist.

When the smoke cleared, the outcome of the battle was obvious. Sasuke stood still, bearing some wounds, yet still maintaining his powerful aura. Naruto, on the other hand, lay on the ground, his body severely injured and unable to get up for a moment.

Although Sasuke won the battle, he did not kill Naruto. He stood beside Naruto, quietly watching him, his eyes revealing a complex emotion. Sasuke decided to gain power in his own way, rather than killing his comrade to awaken the Mangekyo Sharingan, as Itachi had hoped.

Finally, Sasuke turned and left, leaving the injured Naruto behind. He went to Orochimaru's side, ready to continue pursuing his own path.

Time flies, and when Naruto: Shippuden, Sasuke's personality has undergone a huge change. He has become colder, as if he has lost his former warmth. When he first met Sai, he used the Intimidation of his Sharingan alone to make Sai dare not move.