Bang!
After entering the Kamui dimension, Kakashi quickly kicked down Obito and then leaped backward to create some distance between them. He then made hand seals and used Raikiri, using the speed it provided to instantly close that distance.
However, when he arrived in front of Obito, Kakashi stopped!
Obito looked at Kakashi and sneered, "Why are you stopping? Go ahead and use your Raikiri to gouge out my heart."
Kakashi remained unfazed, holding Raikiri and looking at Obito with mixed feelings.
"As I thought, you can't do it, just like before."
Back then, Obito evaded Kakashi's attack by teleporting his abdomen into Kamui Dimension, but they were already in Kamui Dimension, so he couldn't do that.
At that time, had Kakashi used Raikiri, Obito might have been killed. However, Kakashi didn't use Raikiri; he just punched him.
"Hahaha." Obito burst into maniacal laughter and said, "Are you feeling guilty because it's me? Or is it because you can't keep your promise to protect Rin?"
Kakashi sighed and advised, "Obito, give it up now. You can still turn back. You used to want to become Hokage, just like Naruto now. You should be able to see a reflection of your former self in him. I believe you can understand each other. Turn back, Obito. You still have a chance to start over."
"Hahaha." Obito laughed again and said, "Indeed, he is similar to my former self, which is why I know him so well – so naive and childish. Feeling pilty about your enemies and hesitating to strike is truly foolish, Kakashi," Obito suddenly remarked.
"The reason I initiated the war was not because you didn't keep your promise but because you kill Rin with your own hands."
"Obito, actually..." Kakashi wanted to explain that Rin had died because she threw herself into his Raikiri, and it all started because of Kirigakure's scheme, but he was interrupted by Obito's next actions.
Obito voluntarily walked toward Kakashi's Raikiri, allowing it to pierce his chest, all the while smirking and saying, "No need to explain; I've known the truth about that incident for a long time."
"It wasn't you who killed Rin back then; it was Rin who threw herself into your Raikiri."
With Obito's subsequent growth, it was easy for him to investigate the truth of that time.
Back then, Kirigakure captured Rin and forcibly sealed the Three-Tails inside her.
But Kirigakure was not foolish enough to make an enemy village's shinobi a Jinchuriki.
At that time, Konoha was under attack by the other Four Great Shinobi Countries, and it was weakened considerably.
Kirigakure wanted to use this opportunity to send Three-Tails to Konoha using Rin, so that it could destroy the weakened Konoha.
They had modified the seal in Rin's body so that it would break as soon as Rin returned to Konoha, setting the Three-Tails free as a result.
They even deliberately let Kakashi rescue Rin. They even sent some Anbu to chase them toward Konoha.
But Rin had figured out everything. To avoid burdening the village, she resolutely threw herself into Kakashi's Raikiri.
So rather than saying Kakashi had killed Rin, it would be more accurate to say they were both victims, and the culprits were Kirigakure.
Obito even suspected that there was someone behind it, that was Obito, because on that day, Zetsu took him there by some coincidence, where he witnessed the scene of Kakashi killing Rin.
When Obito intentionally threw himself into Kakashi's Raikiri, the scene of Rin's tragic death flashed in his mind.
"Then why did you..." Kakashi spoke with a bitter tone.
"Because everything we see now is fake. You not protecting Rin was fake, and Rin's death was also fake. Only when Rin was alive was it real. It's all because of this world, the village, the shinobi that everything has become fake."
"So, you should understand how ridiculous the phrase 'having no comrades brings pain to your heart' is for me. Because, I no longer have a heart; I can't feel any pain."
Obito pointed to the part that was pierced by Raikiri, which was empty, without even a trace of blood.
"Kakashi, come with me. Let's go to the real world together, where there's no war, and Rin is still alive. We can return to our previous lives."
At this moment, Kakashi noticed that the young Rin and young Obito had inexplicably appeared beside him. They were laughing cheerfully and inviting Kakashi to play with them.
"Huh?" Kakashi closed his eyes briefly, then struck young Rin and Obito with Raikiri, and they disappeared instantly.
Kakashi opened his eyes, looked at Obito, and said, "Obito, illusions can't replace the real world. Don't lose yourself in the illusion."
At this point, Obito's chest, which had been pierced by Raikiri and appeared empty, returned to its original state. It was evident that it was all just a Genjutsu.
"You are currently in a fake world," Obito knew that it was pointless to convince Kakashi and charged towards him.
At the same time, Kakashi also rushed towards Obito. Kakashi's Raikiri pierced Obito's heart, while Obito's Kunai also pierced Kakashi's heart.
"Obito, enough with the Genjutsu; I'm tired of it," Kakashi said coldly.
Then the two of them turned into shadows and disappeared into the air. It seemed as if Kakashi had broken through Obito's Genjutsu, but he was actually still within Obito's Genjutsu. However, Kakashi had already realized that fact.
"It seems I can't convince you. So, the only thing I can do now is send you to your death," Kakashi, formed a seal of opposition like he did when he sparred Obito during their Academy days.
"Heh, same here," Obito chuckled and also formed a seal of opposition.
Kakashi quickly took out a Kunai from his ninja pouch and rushed towards Obito.
Obito took his chain and also charged towards Kakashi.
Clang, clang, clang!
Kakashi struck Obito rapidly with his Kunai, but they were all perfectly blocked by Obito using his chain.
Suddenly, Kakashi threw his Kunai into the air and punched Obito back before performing a somersault kick at the falling Kunai, kicking it toward Obito.
Swish!
Unexpectedly, this combination of close combat left a bloody mark on Obito's face.
They engaged in close combat for a while, and eventually, Obito's chain was knocked away by Kakashi, and Kakashi's Kunai was also knocked away by Obito. The two then resumed the close combat barehanded.
During the hand-to-hand combat, Obito suddenly grabbed Kakashi's left hand with his right hand and grinned, saying, "Kakashi, I'll borrow your hand for a moment."
With that, he forcefully used Kakashi's hand to make hand seals.
Kakashi's pupils shrank suddenly. He hadn't expected that Obito, who used to be the weakest among them, had grown to such a level.
Kakashi broke free from Obito's clutch and jumped back to create some distance between them.
"Fire Release: Great Fireball Jutsu!" Obito spewed out a massive fireball towards Kakashi.
However, Kakashi's hand seals were lightning-fast. At the critical moment, he used Earth Release: Earth-Style Wall to block the incoming attack.
Boom, boom, boom!
The Giant Fireball collided with the Earth-Style Wall, causing a powerful explosion that nearly brought down the wall.
Obito took advantage of this and charged towards Kakashi. However, as Obito closed in, Kakashi suddenly emerged from the ground and thrust a Kunai at him.
Obito smiled as he struck the emerging Kakashi with a sharp Black Receiver, "I've been waiting for that!"
Zzz, Zzz, Zzz!
But to Obito's surprise, as he was struck Kakashi, Kakashi instantly transformed into lightning that electrocuted him.
It was a Lightning Clone!
The real Kakashi suddenly leaped out from behind Earth-Style Wall, holding a Kunai that was imbued with lightning and thrusting it towards Obito.
In this critical moment, Obito's unique body came into play. He endured the numbness and used his palm to strike Kakashi.
Spurt!
Blood spurted as Kakashi's Kunai that was imbued with lightning pierced Obito's heart, and Obito's palm pierced through Kakashi's shoulder.
Kakashi clenched his fist and silently took out his Kunai from Obito's chest.
"Brrghh," Obito took several steps back as he coughed up a mouthful of blood and collapsing to the ground.
"Even if you win his battle, victory is still mine," Obito said with a smile as he used his Mangekyo Sharingan to leave the Kamui Dimension.
His goal had been achieved: Kakashi's Raikiri had now removed the shackles that Madara had placed on him.
However, before leaving the Kamui Dimension, Obito left one last sentence:
"I will never stop until I win."
Obito fell heavily onto the back of the Ten-Tails.
Madara began to use the technique to control Obito and had him activate the Infinite Tsukuyomi. However, Obito's body quickly turned black, and numerous Black Receivers sprouted from it.
In reality, Obito wasn't being controlled. He was pretending to be under control, all while forming hand seals.
"However, the technique he was using wasn't the Summoning: Impure World Reincarnation, but the technique to become Ten-Tails' Jinchuriki.
"Little Tobirama and all Allied Shinobi Forces, hurry up and attack that guy! Tobirama, you and I will deal with Madara. We can't let him fully resurrect." Hashirama ordered Nagasawa and everyone else to deal with Obito as they were closer while he and Tobirama would engage Madara. He conjured six Wood Clones to help him as his clone earlier had been quickly dealt with by Madara's Susano'o.
Tobirama swiftly formed hand seals to create Shadow Clones, but due to the massive Chakra that he expended for the Four Red Yang Formation, he could only create one Shadow Clone.
"Just a clones? Is this all I got?" Tobirama's face showed some disappointment. Why was his younger self so much stronger? He couldn't accept this.
"Everyone, it's up to you now. I need to catch a breath," Nagasawa said, taking a deep breath.
At this point, he had to deactivate his Sage Mode because he didn't have enough Senjutsu Chakra to sustain it any longer. He had forcefully activated it earlier due to the urgency of the situation.
It was his first time using it, and he wasn't accustomed to it, which meant he hadn't fully unleashed Sage Mode's true power. He needed to adjust his breathing and gather natural energy to re-enter Sage Mode.
However, Nagasawa didn't mind. Facing challenges and making mistakes during Challenge Mission was better. That way, he wouldn't make those mistakes in real world.
Sasuke and Naruto nodded, then rushed towards Obito.
Since they weren't far from Obito, Sasuke and Naruto got to Obito quickly.
Just then, a golden light flashed, followed by a red flower blossoming in the air.
Minato appeared right in front of Obito using the Flying Thunder God Technique, then thrust his Kunai at Obito.
Kakashi looked at Minato's Shadow Clone in surprise, wondering how Minato had managed to get there. Had he marked that place beforehand? He sure didn't notice.
"So it's you, Obito..." Minato had a complicated expression as he gazed at the fallen Obito.
"Sensei..." Obito managed to glance at Minato before lying motionless on the ground.
"I don't think I ever told you that the Flying Thunder God marks never disappear," Minato said slowly.
That was why he instantly knew Obito was the masked man from that night.
At the moment Obito emerged from the Kamui dimension, Minato sensed the Flying Thunder God marks on him.
"Sigh," Minato sighed. "I didn't expect our reunion to be like this."
Meeting your disciple as a resurrected corpse should have been a joy. But Minato had no choice but to attack. He didn't know what to say.
"This is too easy. All that's left is to seal Madara and Ten-Tails, and the war will be over," Sasuke commented casually as he approached.
Minato was about to say something when Obito, who appeared to be dead, suddenly feigned death, sneering, "Why would you think the war is over, my former comrade?"
With Obito's words, the ground shook violently. The massive Ten-Tails began to shrink, breaking free from Hashirama's Sealing Technique and went to Obito.
Minato and Sasuke were both startled and quickly retreated. The intense suction almost pulled them in as well, but fortunately, Naruto, nearby, used the Nine-Tails' Chakra to create a large hand to grab them.
"What's going on? Is the Ten-Tails changing form?" Sasuke was puzzled.
"This isn't Samsara of Heavenly Life Technique; he planned to become like this from the beginning," Naruto said seriously.
He had seen Nagato use Samsara of Heavenly Life Technique before, and it wasn't like this at all.
The Ten-Tails continued to shrink rapidly until it became a white spherical object.
Crack!
Cracks appeared on the white sphere, rapidly expanding.
Boom!
Just as the cracks covered the entire sphere, Obito emerged before everyone with his whole body turning light gray, with one large and one small horn on his head.
"This guy has become the Ten-Tails' Jinchuriki," Naruto said with a serious expression.
Beside him, Sasuke asked curiously, "Naruto, how do you know he became a Jinchuriki?"
Naruto explained, "I've become friends with the Tailed Beasts. They've given me their Chakra, so I can sense that Ten Tails' Chakra is entering Obito's body."
Boom!
Suddenly, red torii fell from the sky one after another, suppressing Obito.
Hashirama attempted to use Gate of the Great God to suppress Obito by subduing the Ten-Tails' power.
"Amazing!" Watching Obito being crushed by the Gate of the Great God, Naruto exclaimed excitedly.
"Be careful, stay back!" Nagasawa reminded.
At the moment Obito became the Ten-Tails' Jinchuriki, Yamato felt a sense of danger. Obito was incredibly powerful now, and Gate of the Great God couldn't suppress him anymore.
The reason he was temporarily suppressed was that Obito had just obtained this immense power and hadn't yet adapted to it.
Because of how overwhelming Nagasawa seemed earlier when he massacred the Ten Tails' fissions, Naruto and the others believed him and quickly retreated.
Just as they retreated, a massive explosion occurred. Gate of the Great God that had been suppressing Obito were destroyed in an instant.
"How is this possible? Even brother's strongest Sealing Technique is..." Tobirama said in disbelief. He couldn't fathom the extent of Obito's new power.
"This is troublesome, Minato, Naruto, can you lend me some chakra?" Nagasawa scratched his head.
Although he had more Chakra than your average Shinobi, it was still too little compared to these monsters. His earlier attack had wasted too much unnecessary Chakra, nearly half of it.
To ensure he wouldn't run out of Chakra in the upcoming battle, he needed two power banks.