When Time ends and Eternity Begins
Rokudime Hokage Naruto Uzumaki lay down for the final time in his bed. He was eighty seven now. Much like his former mentor the Sandime he had lived and served his village to a ripe old age. Leading the peoples of the shinobi world into an era of peace after stopping the rise of the Jubi and killing Tobi and his minions. Karuma, fully joined with his yin and yang chakra in balance was willing to go through with this final plan to rid the world of the Jinchuriki system once and for all. Naruto's entire bedroom and body where covered in a sealing array that only true masters of the art would ever be able to determine the true meaning for. It was a time space array that would fling the user far into the future following the person's blood line to a descendent that would then become host to the user's consciousness. It was based slightly on Orochimaru's original body swapping jutsu but for one key detail. Instead of forcing a take over the user was given a chance to ask permission and the relationship would become symbiotic.
Normaly Naruto wouldn't have considered doing something like this but he was counting on his high natural chakra reserves that, had only grown over the years, along with Kurama's to send him and the last bijuu far enough into the future that the tales of Jinchuriki and their abilities where mere legends. It took him nearly fifteen minutes to get through the hand signs to activate the array, and considering his sign speed had only decreased slightly as he got older it was indeed a considerable amount of signs.
He was flung far indeed into the future as he finished the jutsu. He saw the world he had strived so hard collapse after only five generations much of the knowledge lost to myth and legend. He saw his descendants move west to newer countries, integrating into the pagan religions and life of the druids. Becoming known as wizards first as the line of Gryffindor then latter the last daughter of that line as peverell and finally Potter. The reemergence of technologies similar and greater than what his own time had. He saw as the last young couple of his line was struck down by a man steeped deep in dark chakra, his mind as warped by rage and vengeance as Sasuke's had been. The mother cried for mercy on her only son and Naruto took his chance he entered her mind and brought her in with him, stopping time around them as he brought her in to her mind with him.
~1~1~
Lily Potter looked around frantically, she was in her mindscape, the living room of her child hood home. How had she gotten here? Had the trauma of what was about to happen been too much? No she was stronger than that. Then she noticed it. Another presence in her mind with her, immense and ancient. She turned and saw a blond man in his late thirties sitting in her father's old lazy boy chair. He wore white robes and had a slight eastern aristocratic look to his face, even with the whisker like birth marks on his face. He had that look on his face that James always had when he was about to pull a massive prank. "Who are you and what are you doing in my head. If you hadn't noticed I'm a bit busy."
The man smiled, "my family always seems so drawn to strong redheads." He muttered more to himself than her but she still heard it. "My name is Naruto Namikze, the far distant ancestor of the Potter line, from what your people know as Atlantis, and mine called the Elemental nations. I have slowed time for us by bringing us deep into your subconscious but I must be fast." Naruto said seeing questions forming on her lips, "I am here to offer your son, who I would normally make this offer to is far too young to understand what I am saying I offer it to you. At the time of my death I was leader of my nation both military and civilian and we had just ended a great war over control of power that for generations had kept a rough semblance of balance but in truth only fostered a cycle of hate and anger among the people of the Elemental nations. Being the container of the last of this power I used a strong spell to cast my consciousness and this power far into the future. This spell would allow me to offer a descendant that I deemed worthy the opportunity to host my consciousness and learn from me. I have offered this to only three others who have refused graciously. This is not a burden to take on lightly but I fear if I do not interfere here there will be no one left and I will be sucked back through time to the point of my death and all that I fought to stop will be for naught. If you accept on behalf of your son, I will be able to protect him from the man currently brandishing his wand at you, though it may weaken me for a time, I will still be able to protect and help your son with the struggle set before him."
Lily thought for a moment. This all seemed so surreal to her but she had read some of the Potter journals once she became Lady Potter. Godric Gryffindor had made mention of something similar that in his youth a specter had appeared of a blond man in white robes who offered the power of his ancestors. He had refused confident enough in his own power and the specter had accepted this leaving behind a gift in the form of knowledge of body augmentation magick. This magick had lead to Godric becoming one of the foremost warriors of the age before founding Hogwarts, and also a well kept family secret. If this was the same specter than this may be her only chance to save her son and leave him someone aside from Sirius and Remus, as Peter had obviously betrayed them, who would be able to teach their son how to be a Potter.
"Alright, I accept on behalf of my son Harold James Ignotous Potter. Please save him!" she said pleading in the end.
Naruto nodded and time sped up and the world came back into view around them, only for Lilly to be struck down by the bolt of green energy that was the death curse. Naruto moved fast sending his and Kurama's chakra into a protective barrier around young Harry rebounding the curse sent the baby's way back to its master, shattering the barely human wizard's body and soul. A piece of soul shard tried to burrow its way into the child to possess him but Naruto kept it out leaving only a lighting shaped scar. A sealing array formed all over young Harry's body before condensing into an Uzumaki swirl on the boy's stomach, and Naruto and Karuma settled into the boys mind. But that didn't matter to the two at the moment as they both fell into a sort of healing sleep to recover the chakra they had lost traveling through time and fending off the latest dark lord.
Karuma looked at his friend and partner and smiled, "I am no longer needed boy, father's goal is yours now." He thought to himself and let the last of his chakra be absorbed into the blond man before he could protest.
Naruto was shocked but not overly so, he had been expecting it for some time. So he would be teaching his many great grandson alone. So be it. With that he rested, though little did he know it would be seven years before he was awoken to the world at large and his charge's miserable state there in.