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"My chakra is almost completely gone," Naruto thought, struggling to maintain his strength. Seeing Naruto's weakened state, Hinata decided to offer him her chakra, but Toneri immediately intervened.
"I won't let you!" Toneri shouted, using his telekinesis to push Hinata away. With Hinata held back, Naruto was defenseless. Truthseeker rods impaled him, leaving him utterly helpless. Toneri then extended his hand, which was enveloped in green chakra, through Naruto's chest.
Within this strange place, the Nine-Tails, Kurama, stood before Toneri. "Fascinating, so this is a tailed beast. What a vile creature. What was the Sage of the Six Paths thinking? Still, its power is tremendous. You'll make a fine addition to my strength."
Toneri's words deeply offended Kurama. Not only did Toneri see him as a mere tool for power, but he also insulted Hagoromo, the one who granted Kurama life.
"Shut up! You don't know anything about the Sage of the Six Paths!" Kurama retorted.
However, Toneri paid no attention to Kurama's words and proceeded to absorb all of the Nine-Tails' chakra into himself, becoming the Nine-Tails' jinchuriki. To ensure the Nine-Tails' obedience, Toneri placed a green orb inside the beast, which worked.
Naruto fell to the ground, defeated and dying from the extraction of the bijuu. He remained conscious due to the life force provided by the Hashirama cells in his right arm. However, his survival was only a temporary delay.
Using her Byakugan, Hinata observed that the bijuu had been extracted from Naruto. Overwhelmed with anguish, she shouted, "Noooooooooo!" - a pain she never thought she would experience in her life.
In his final moments, Naruto's thoughts raced: "Is this it? Am I going to die here? I'm sorry, everyone. In the end, I couldn't keep my promises to Mom, Dad, and the pervy sage. I couldn't become the Hokage, and I failed to bring about the peace I promised. So many people have sacrificed themselves for me because they believed in me, and yet... it's okay. Sasuke is still here; I'm sure he can find a way to save everyone. Hinata, I genuinely loved you, and I wish we could have been together."
"Sorry Sasuke, I leave this to you, don't you dare die"
Naruto passed away with a faint smile on his face. Although his spirit had been crushed by the realization that he couldn't save everyone, fulfill his dreams, or keep his promises, and he had been unable to mend his broken heart due to the loneliness he felt in the absence of Hinata's love and the opportunity to start his own family, he found comfort in the fact that Sasuke was still alive. Naruto had full confidence in Sasuke's ability to rescue everyone, and that gave him some peace of mind. He wasn't overly worried.
"Naruto!" Sasuke, while defending Konoha from meteors, felt Naruto's chakra vanish. They had a deep connection, their souls intertwined as if they were one. If one was lost, the other felt incomplete. Sasuke suddenly felt as if he had lost a part of himself. He immediately wanted to teleport to Naruto's location, but the question lingered: who would defend Konoha if he left?
"Dammit, Shadow Clone Jutsu!" Sasuke's decision was reckless, and he was well aware of it. He lacked the immense chakra reserves that Naruto possessed. By dividing his chakra with a clone, he significantly weakened himself. But he had no other choice; he needed to leave, even if it meant facing a stronger opponent than Naruto while operating at half-strength.
Toneri approached the sobbing Hinata and placed the green orb into her, once again completely subduing her. He absorbed her chakra to replenish the Nine-Tails' chakra reserves.
Suddenly, a black portal opened on the moon, and through it emerged Sasuke. He quickly spotted Naruto's lifeless body and rushed to his side. Upon inspection, Sasuke swiftly deduced that Naruto had died due to the Bijuu extraction. As he examined Toneri with his Rinnegan, he could clearly see the presence of Kurama's chakra.
Rage and despair welled up within Sasuke. This man was already formidable enough to defeat Naruto, and now he had claimed Kurama's power for himself. Sasuke felt the same sense of powerlessness and hopelessness he had experienced during the Uchiha massacre. His anger and hatred for the Otsutsuki before him reached a boiling point. The pain of losing someone dear to him once more fueled an unimaginable power within him. As sorrow and hatred were the source of his power.
As Itachi had once said, the moment he was born an Uchiha, he was cursed with the blood-soaked destiny of his clan. He had a duty to protect everyone. If he failed here, everyone he loved would die once again. His mind started to drift into a dark place, allowing those thoughts to course through him.
"Amaterasu!" Black flames raced toward Toneri, but he deftly avoided them, much like the Raikage's agility. Sasuke then unleashed a fireball, cloaked in Amaterasu flames, which Toneri intercepted with one of his truthseeker orbs. Seizing the opportunity, Sasuke swiftly switched places with one of his orbs and attempted to strike Toneri with a Chidori. However, Toneri's 360-degree vision allowed him to react to Sasuke's teleportation.
In response, Toneri launched a potent counterattack using an orange chakra arm. Sasuke, relying on his Sharingan precognition, managed to react in time and activated his Susanoo ribcage to shield himself from the blow. Nevertheless, the ribcage only partially mitigated the damage, and Sasuke was sent hurtling through the air, crashing at high speed into a nearby wall.
"(Dammit, he mastered Kurama's power this quickly? What's next, a Tailed Beast Bomb?)"
"I see, this thing is indeed quite useful. Let's test the true extent of its power," Toneri manifested Kurama's avatar and began making a Tailed Beast Bomb, enhancing it with the Tenseigan's power to make it even stronger
"This is really bad," Sasuke's mind raced to find a way to defeat Toneri. Sasuke recalled the moments when Naruto, in the early stages of using Kurama's power, sometimes struggled to maintain his perfect Tailed Beast form because their connection wasn't flawless yet. When that opportunity presented itself, Sasuke had to deliver a decisive blow.
"Amaterasu," Toneri's Tailed Beast Bomb was engulfed in black flames.
"What?"
The Tailed Beast Bomb began to shrink and weaken as the flames actively consumed the chakra within it. Nevertheless, Toneri opted to proceed with launching the Tailed Beast Bomb. Sasuke, encased in his Perfect Susanoo, rushed toward the explosive with Chidori at hand. Just moments before the impact, Sasuke swapped places with the Tailed Beast Bomb.
"What?" Toneri hadn't anticipated this; he believed he would confront the Tailed Beast Bomb directly. The shockwave generated by the Tailed Beast Bomb propelled Sasuke at extreme speed, a maneuver that Sasuke had planned. Sasuke reduced the size of the Tailed Beast Bomb because a Tenseigan-powered one could have caused a cataclysm that probably even he couldn't withstand.
Moments before the clash of Sasuke's Chidori and Toneri, Toneri shielded himself with Truthseeker Orbs. However, Sasuke remained relentless, "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" Both men shouted as they tried to overpower one another. Sasuke heightened the power of his Chidori by adding Amaterasu to it, causing the shield created by Toneri's Truthseeker Orbs to begin cracking.
"Shinra Tensei."
"Aagh!" Sasuke was sent flying. (He can use Shinra Tensei too? Dammit.)
The orange tint beneath his green chakra cloak vanished.
"Hm? What's wrong?" Toneri inquired of the fox but received no response, for it was now nothing more than a puppet. "Oh, I see, our link isn't per-"
"Now!" Sasuke kept a close eye on Toneri, and the moment the orange tint vanished, he teleported to Toneri with his sword in hand. He swung his electrified sword at Toneri, who reacted in time but couldn't entirely evade the full slash, resulting in a severe cut on the right side of his chest.
Toneri quickly put some distance between himself and Sasuke. Sasuke began panting from exhaustion; he had expended way too much chakra. Toneri initiated an onslaught of rocks directed at Sasuke, which Sasuke sliced into smaller fragments with his sword and agile movements. However, Sasuke's speed gradually slowed down, and he grew fatigued. As he continued to divide the rocks into smaller pieces, the fragments became increasingly challenging to intercept.
"(Dammit, there must be a way to defeat him now, but...)" As Sasuke continued to slice up the rocks, he thought, "(First inner gate, open!)" Sasuke had learned the first gate as a genin under Kakashi's guidance to mimic Lee's speed. Who would have imagined it would come in handy at this moment?
"He's fast!" Toneri was taken aback by Sasuke's sudden burst of speed. Sasuke closed the distance rapidly and unleashed Amaterasu at point-blank range, catching Toneri off guard. Unable to dodge in time, Toneri was engulfed by the black flames, pushing Sasuke away once more.
Sasuke decided to land beside Naruto and kept a watchful eye on Toneri to assess the effectiveness of Amaterasu. A portion of Toneri's green chakra, encased in the black flames, broke away from him, much like how Naruto had shielded himself from Amaterasu. "Dammit, it's not effective either," Sasuke muttered in frustration.
Toneri unleashed a barrage of Truthseeker rods to impale Sasuke, but Sasuke deflected them with his sword.
Sasuke grabbed Naruto's body
"What's wrong? Are you done wasting your chakra?"
"You better remember those words, Otsutsuki, because I'm going to feed them right back to you!" Sasuke declared as he vanished with Naruto's body. Before teleporting, Sasuke caught a glimpse of Hinata "(I'll save you too, I swear.)"
The orange tint beneath the green chakra cloak reappeared and fully healed Toneri's wound. "I see, it also grants regenerative abilities. Very useful."
Toneri stood victorious, watching as the Earth drew closer and closer to the moon.
"The world of the Sage of the Six Paths will end."
