A/N: Hei guys, I hope you will enjoy this story. I will still continue my other stories but I'd like to begin a new one. Please any feedback/criticism is welcome! Now before anyone who reads this, the main OC will be powerful ONLY in the BEGINNING! Basically imagine it in a sense of the 1st Assassin creed game, the character (Altair I think) got... demoted in a way? The OC is not a Mary-sue where he thrashes everybody, his powers will be greatly, i mean greatly diminished in the next few chapters to come...
Other than that, please enjoy and review to drop me your thoughts

Disclaimer: I do not own Naruto, those rights belong to Masashi Kishimoto. Only ones are my OC.

PROLOGUE:

The battlefield between the Shinobi Alliance against Obito, Madara and the Jyuubi was catastrophic, with dead bodies of the Shinobi Alliance scattered across the area. Although the Jyuubi was currently sealed in a barrier constructed by the four previous Hokages, the Jyuubi had created small versions of himself to battle against the Shinobi Alliance.

As the battle progressed, Uchiha Madara noticed his 'partner' returning from the other dimension, bleeding profusely and a large hole on his body. Considering the situation, Madara realized that Obito had served him enough and in his current condition, Madara felt that Obito was only useful for one purpose.

'Looks like I won't be able to use him anymore.' Madara thought. 'I wanted to butt heads with Hashirama before I become the ten-tails Jinchuuriki... But now I have no choice in the matter.'

Madara formed a seal and immediately Obito screamed in agony, the right side of his body engulfed by a dark, black color. Obito immediately recognized it as Madara's will and he could no longer control his body. Despite resisting the commands, Obito slowly formed a seal and the right side of his body now completely engulfed by the will of Madara.

"ARGHHHHHHHH!"

The screams of Obito immediately caught the attention of everyone, including Uzumaki Naruto and Uchiha Sasuke. The four reincarnated Hokages also noticed the scream and the 1st Hokage, Hashirama Senji immediately knew what was happening.

'He is being controlled by Madara?' Hashirama thought, analyzing the situation. 'This is bad...'

"Naruto, Sasuke! The two of you are closest to that man! Stop him before he completes the Jutsu!" Hashirama barked.

Naruto and Sasuke immediately obeyed, both of them commanding their respective summons to stop Obito from completing whatever technique he was attempting. Madara merely grinned at their futile attempt and awaited for Obito to commence the Rinne'Tensei Jutsu to finally revive him. Once he was alive, he could finally become the Jinchuuriki of the ten-tails.

"Sasuke, stop him!" Naruto yelled.

Sasuke grunted and activated the Mangekyou Sharingan, immediately calling forth Susano'o. Sasuke's Susano'o then immediately fired a large arrow towards Obito however before the arrow even connected with Obito, the Jyuubi suddenly retracted itself, decreasing in size and then being absorbed into Obito's body.

This act immediately caught Madara's attention and he watched what was happening. Once he realized what Obito had done, he merely smiled and sighed when he saw the Jyuubi being absorbed by Obito.

"Heh... I failed, huh?"

As the Jyuubi was being absorbed into Obito, Naruto and Sasuke had no where to land. Minato Namikaze reacted quickly, throwing one of his famous unique kunais and once the kunai was close to the two young ninjas, he released the seal and appeared next to them. He then grabbed the two and teleported back to his original position, continuing with the barrier technique.

Minato was confused and asked his son. "What is going on?"

"This was his plan all along!" Naruto declared in frustration. "He... He always wanted to be the Jinchuuriki of the ten-tails and now... we were too late!"

Sasuke said nothing but even he could tell that Naruto was right. Obito was absorbing the Jyuubi into him and becoming the Jinchuuriki of the Jyuubi. Everyone among the Shinobi Alliance watched in horror as Uchiha Obito slowly completed his transformation and no one knew what was going to happen. The dark skies above them illuminated the hope that the Alliance had; nothing.

Madara smirked once Obito was close to finishing the transformation. "Well at least the plan can still continue."

"This is not good..." Kurama, the nine-tails pointed out.

"What do we do...?" Naruto asked.

"The ten-tails is powerful enough as it is. If that brat becomes the Jinchuuriki along with an undead Madara... I don't think even the previous Hokages have much of a chance."

"There has to be a way, right?!"

Kurama made no reply and Naruto knew that they were in a grave situation. Finally after a couple of seconds, Obito had finally completed his transformation and had fully absorbed the ten-tails within his body. He had changed drastically since he absorbed the monster.

Obito had healed all his wounds, including the large hole had in his body earlier. Also his Rin'negan and his Sharingan were now white in color, his hair also white. On the right side of his body, it followed some of the Jyuubi characteristics and was also bright white in color.

None of the Shinobi Alliance dared to attack Obito, not knowing the capabilities of his power. Even Madara himself was curious with how much power the young Uchiha had gained from becoming the Jinchuuriki.

Obito raised his right arm and then waved in front of him. Instantly, the land was destroyed and shook wildly as if it was an earthquake. The destruction and power was so great that it threw a large number of the Shinobi Alliance off their feet, landing a couple of hundred feet away despite their distance between Obito and them.

"This power..." Obito murmured. "Heheheheh... I feel... refreshed!"

Naruto had to acknowledge that the power Obito revealed was far too powerful for anyone to confront them currently. Despite all of his power-ups, the young blonde Jinchuuriki felt that he would not be able to stop Obito, not when Obito was the ten-tails Jinchuuriki.

Obito raised his left arm this time to deliver another wave of destruction and the Shinobi Alliance immediately prepared for it. Sasuke activated his Mangekyou Sharingan and was going to throw an Amaterasu towards Obito when Obito waved his arm, sending shock waves towards the Alliance. This time the attack was far more powerful, the shock wave pushing the entire Alliance off their feet, including Naruto, Sasuke and even the previous Hokages.

Naruto and Sasuke crashed on the ground as if they were rag dolls, bruises appearing on their body from landing so roughly on the ground. Obito laughed at the sight, enjoying the sight of Naruto struggling to actually get back on his feet. However Obito still laughed and then pointed at something behind Naruto. The young blonde ninja turned back to discover a horrifying sight.

Behind him were the dead bodies that received the second shock wave, the attack so powerful that it damaged the internal organs. Many were incapacitated and coughing blood from the attack. Naruto clenched his fists in anger and glared at Obito with a high amount of killing intent radiating from Naruto.

Obito merely grinned at the sight. "Come, Naruto... Show me what you got!"

Obito this time raised his arm to try another attack and Naruto dashed towards Obito to stop him. However Obito never got the chance discover what sort of attack it would result in.

Lightning suddenly struck from the dark skies, obliterating the ground followed by several more lightning strikes. The sound caused by the lightnings were deafening, echoing throughout the battlefield. Obito himself found this odd, watching the lightning strike several more times before it stopped. Then from the dark skies, a small gateway appeared and from the gateway, a man with dark, spiky blue hair appeared from the gateway.

The man with blue hair stepped out of the gateway, surveying the battlefield. Obito, Madara and the Alliance all stared at the man, confused at the sudden appearance. The man had a large sword strapped onto his back about five feet long and three feet wide and had a large, strange symbol placed on the blade. The man shook his head in disappointment when he checked his surroundings and his sight landed on Uchiha Madara.

'Those eyes...' the man thought. 'No doubt about it. He must be a descendant of what he came to be known as 'Rikoudo Sanin. The situation is much worse than I thought.'

It was then that his spotted Obito and realized what had happened. 'Not good. He absorbed the ten-tailed beast...? If he did then even I... Damn it, did the Child of Prophecy fail in his mission?'

The blue haired man continued looking around until he found what he was looking for, his eyes sighting Uzumaki Naruto. Without further thought he sprinted towards Naruto and the Alliance wondered if they should attack the man for they did not know whether he was ally or foe.

Obito scoffed at the man and raised his arm. 'Foe or not, I will kill you!'

Obito's then threw down his arm while aimed at the new arrival. From above the dark skies, a large bolt of lightning, three meters wide at least, blasted from the skies. The blue haired man looked up at the sky and cursed at the power.

"You can already use such power...?!" He cursed, grabbing his blade and activating the weapon.

Immediately his large sword was surrounded by lightning green in color and defended himself from the lightning blast. The large lightning smashed into the stranger's blade but it could not break the sword nor could it even hurt the man. The man struggled against the attack before he screamed in agony and deflected the attack, the lightning from Obito sent back to the skies and disappearing from sight.

"What... Who is he...?" Obito muttered to himself.

When the man reached Naruto, Naruto was already in a defensive stance as he was not sure whether he was friend or foe. Sasuke himself watched the blue haired man suspiciously, prepared to attack should he become hostile.

"You are Uzumaki Naruto, correct?" The man asked.

"Who are you...?"

"Answer my question! Time is of the essence!"

Naruto was silent for a second before he gave a nod. The man then quickly continued. "I am Ryo Azuma and I cannot explain everything right now. However I can tell you this. This world is going to be destroyed... Alright perhaps not destroyed, but you are not going to win this battle."

"What makes you so sure of that?" Sasuke demanded.

"That man has the ten-tailed beast within him. Not to mention that even without it, he was powerful enough as it is. Also they have the Rin'negan, a power from that 'Rikoudo Sanin.' If we do not act now, it will be too late!"

"So what do you want me to do?!" Naruto asked.

The man created a seal and then opened another gateway next to him. "If you come with me, you can maybe have another chance to save this world. But I cannot explain now, you will just have to trust me. You can either die today and lose all hope or come with me and perhaps have a chance to save this world!"

"You are obviously not from around here, so why do you concern yourself so much over this?" Minato asked with a suspicious tone.

"Like I said, I cannot explain right now!" Ryo answered and then looked at Naruto in the eye. "IF you wish to have another chance, then I can tell you who I am and why saving this world is also my business even If this is not my home world! Now tell me Naruto!"

Naruto was still confused and all he had heard was that he had two choices; to die in this world or perhaps have another shot at saving the world. In the current situation, Obito was already too powerful and Naruto had no doubts that Obito would easily defeat them.

"Go for it kid... That might be our only hope..." Kurama suggested.

Obito decided that whoever the man was, he was someone he had to kill before he becomes an enemy. The simple fact that despite his new powers, the stranger could actually deflect his attack and he wanted to commence the Eye of the Moon Plan without failing. Obito then began forming seals in preparation to destroy Naruto, the stranger and the entire Shinobi force.

When Ryo realized what Obito was doing, Ryo almost screamed. "Naruto, I need an answer now!"

"...Fine! I want another chance!"

Upon receiving the answers, Ryo quickly grabbed Naruto and ran for the gateway. Obito by then completed the seals and released the biggest Bijuu Bomb ever seen. Because the entire Shinobi Alliance was busy listening to the conversation between Ryo and Naruto, none had prepared themselves and were easily wiped out. Sasuke, the previous Hokages and the Konoha 9 quickly prepared a quick defense. Sasuke activated his Susano'o, the previous Hokages a barrier and that was the last Naruto saw of his friends and family before he entered the gateway.

Ryo immediately shut the gateway and Naruto saw no more of his comrades. He knew not whether his friends even survived the encounter and the thought of them dying frightened him.

"Pull yourself together Naruto..." Ryo stated as he strapped his large sword back to his back.

Naruto then realized he was in a pitch, black area with several more gateways surrounding them. Whoever Ryo was, Naruto realized that the man was definitely not from his world.

"Alright then Naruto, as you should have guessed I'm not from your world. However there is no doubt that your world cannot be saved and the destruction of your world is something I cannot allow to happen." Ryo explained.

"Who are you anyway...? Why is the destruction of my world of such concern to you?!"

Ryo said nothing for a few seconds before he answered. "I guess to put it simply, I am a Guardian of World of sorts... I have been given the charge to protect your world and I came too late... I never expected the descendant of the Rikoudo Sanin to be of such a threat but... Anyway, we still have a shot of saving it again though."

Naruto stared into Ryo's eyes, curious for the answer. "And how do we do that...?"

"...By entering an alternate World of yours..."

***Chapter End***

A/N: Oh an important note by the way. While this story does focus on the pairing of Naru X Saku, do note that their relationship will take time to blossom. It does not happen in just a few chapters. Thought Id drop this on you guys.