Chapter 1: The Birth of a Legend

He was dead, he knew it but what he didn't understand was that why was he in a white void, he knew those who were killed by a quincy were forever kicked out of the reincarnation cycle so was this the place where everyone who died by the hands of a quincy end up.

During his fight against the Quincy King, Yhwach, Genryūsai Shigekuni Yamamoto, the Captain Commander of the Gotei 13, had given everything he had against the man he thought was the Quincy king but later he learned that all this time he was fighting a fake one while the real one arrived at the last moment and striked him. But he wasn't worried because he knew that one of his students Ukitake or Shunsui, most likely Shunsui would take his place as the new Captain Commander of the Gotei 13, and he also knew that Ichigo Kurosaki would defeat the Quincy King in his instead so he knew that everyone was safe and he also knew that everything will be okay.

"You are not dead yet Yamamoto." a voice filled with so much power and wisdom that even he, the strongest and oldest shinigami, could never even begin to fathom rumbled stopping his musings.

Yamamoto spun around to see the sprit king himself standing there, he bowed to the powerful entity, "What do you mean by that my lord?" he asked.

"I meant that you are not dead yet neither are you alive, you are in a state between life and death and this place is called as limbo." the powerful entity spoke.

"What do mean that I am in between a life and death state my lord because I remembered dying at the hands of Yhwach!"

"I meant just that, your time has not come yet, there is one more task that you must accomplish." the spirit king said.

"What is this task that you wish to give me?" he asked

"In another dimension similar to that of the world of living, there is a boy who will change his world but he is not strong enough. I have given the boy the powers of a shinigami and all he needs to do is awaken them and this is where you come in. When the boy awaken his powers, you will become his Zanpakutō spirit while you merge with your own Zanpakutō spirit, Ryūjin Jakka, gaining his memories and his skills while also retaining your physical body, skills and knowledge. You have to train that boy to be strong, help him, guide him where he can change his world, for there are two great threats that looms over that dimension and only this boy can stop them." the spirit king said.

"But why me my lord, surely he must have his own Zanpakutō spirit if you have given the powers of a shinigami!"

"Because of his strong relation with fire for one, he has so much potential that one day he might even be able to surpass you Shigekuni." making the old man's eyes widened for a bit. "But the main reason is that I think you can guide the boy to the path of greatness while also teaching him how to humble and gentler person and there is also the reason that inside his body resides his foster father, who is currently stopping a process so that the boy does not turn into a dragon, the Fire Dragon King, Igneel."

"Are you saying that a dragon, a king no less, raised a human child?" the old man asked a little astonished by this new information.

"Yes, and as I was saying the boy's father would destroy the Zanpakutō spirit if he thought that it is trying to harm the boy, but you can explain everything to Igneel while also getting his help in training and guiding the boy. And before you ask there is no need to be worried about the boy's mental stability after gaining so much power because his heart is as pure as they come." the powerful being informed, "So do you accept this task?"

"Yes my lord I accept."

"You will gain all the information about that world when you see the boy's memory while also asking Igneel about it." the spirit king while the old man's body was covered in a golden light. "Train him well Shigekuni, for that world's future depends on that boy." was last thing the old man heard before he was gone.

Magnolia, Fiore

Year X782

Natsu had just gotten the news that his first and best friend, Lisanna, the first person to ever believe in him appart from his father and gramps, was dead, while the girl he loved more than anything in the world, Mira, Lisanna's older sister, was crying and he couldn't do anything to stop it from happening because he wasn't strong enough. The moment he heard the news he ran from the guild to his home and cried there.

He wanted to become strong, stronger than he was now, stronger than anyone else to protect those he care about, to never see the girl he loved more than anything cry anymore. He wanted becoms stronger and stronger and stronger. Suddenly he felt a strange power, a power that he was so unfamiliar with yet it was familiar at the same time, wash over, then he heard a voice.

"So you want to become stronger boy?" a voice, a voice that was old and filled with power and wisdom that only came with years of experience, asked causing the fire dragon slayer to jerk his head in all directions, searching for the owner of the voice, while he also tried to sniff the air to find him but to no a avail.

"Who are you and where exactly are you?" he asked.

"Do not ask any questions yet, all will be answered in the due time, but first tell me do you want to become stronger, do you want to become strong enough to protect your loved ones?" the voice asked again.

"Yes I want to become stronger, stronger than I am right now because right now I am not strong enough to protect anyone." he said with determination in his voice.

"Then I shall help you get stronger but for now rest. I will talk to you later." the voice said before Natsu went unconscious.

Natsu's Inner World

When Yamamoto entered the boy's inner world the first thing he saw was a volcanic island, and when he tried to sense Igneel, he found out that the old dragon was inside the river of the lava that was flowing near the volcano.

"Who dare to enter my domain?" a powerful voice spoke while from the lava river came a giant red dragon.

"My name is Genryūsai Shigekuni Yamamoto." the former shinigami said.

"Why have you came here?"

"I am here because I have been assigned by the spirit king, you may know him as the God, himself to train your son in the arts of shinigami while he also told me ask you to train the boy as well because according to him there are two major threats that looms over this world and only this boy can stop them but right now he is far to weak to do anything." the old man said.

"Let's say I believe you but you still haven't told me who exactly are you?" Igneel said while releasing a bit of his power reminding Shigekuni that infront of him was no human, shinigami or quincy, infront of him was a mighty dragon king, so he had to resolve this quickly or all this would be for naught.

"I am Genryūsai Shigekuni Yamamoto, but that is not my real name anymore but I will tell you that afterwards, I am or was a shinigami, a shinigami's duty is to send the souls to the soul soceity while also purify the hollows, fallen spirits who hunt down others, be it a human soul, a shinigami or even their own kind, and eat them in order to ease their hunger to also get stronger. I was the Captain Commander of Gotei 13, an organisation of shinigami separated into 13 divisions, each with their own Captains, all which were under me. I was the oldest and strongest of them all." he took a deep breath.

"During my last battle, I had to fight an extremely powerful enemy, the quincies. Quincy are the human with high spirit energy, they use their powers to destroy the hollows, not purify them but kill them, effectively knocking them out of the reincarnation cycle. Anyways, they attacked us, I faced their leader, the strongest of them all, I brought the full might of my powers upon him but then it turned out that he was fake and before I could even react the real one appeared before me and striked me down. When he striked me I went into a state that is between life and death called as limbo. And that was where I met the spirit king who told me to help this boy and train him in all that I know."

"Right now I am his Zanpakutō spirit. Zanpakutō also known as the soul slayer, are used by a shinigami to purify the souls of hollows. Zanpakutō are the physical manifestation of a shinigami's soul and are used as weapons in order to fight." the old man explained.

While the former old shinigami was explaining everything, Igneel just stood there listening to everything that the old man said. After everything was explained, Igneel was in deep thought, he knew that the man before him was not normal, he was far more powerful than anyone he has ever seen, except maybe for Zeref and Acnologia. He also knew that his son was not strong enough to stop them and he knew that there was not much time before both the black wizard and the black dragon attack, he knew that while he was strong, stronger than most creatures, he was not strong enough to stop Acnologia as he was now.

He also couldn't detect any lie from the old man before him, being the king of fire dragon, he was able to sense the emotions of others since fire was directly linked to the emotions. For sometime he thought over what he should do, before which he came to a conclusion.

"I believe you and I will help you in my son's training. There are somethings that I haven't taught him yet." Igneel replied

"It seems that we are in agreement that you and I will teach him everything that we know." Yamamoto said before he looked at Igneel with curiosity and confusion clear in his eyes. "I have one question though!"

"And what would that be?"

"I sense that there three more types of power that Natsu possess but they are sealed, two of them feels like your own while the last one feels like that of a demon. May I ask why is that?" he asked

Igneel hearing the question sighed, he was hoping to avoid this particular conversation but it seems that he don't have much of a choice.

"The day before I sealed myself inside his body, I implanted two dragon lacrima inside him, one of them was my own, the fire dragon lacrima, while the other one was my mate's, it is the lightning dragon lacrima, she was the queen of lightning dragon. She was the only one who could use the blue lightning, which is several times faster and stronger than your average yellow lightning. I sealed those two powers of his because at the he was not strong enough but now that we are going to train him might as well tell him about it and unseal them." the mighty fire dragon replied.

"I see. And what about that demonic power?"

"You are sensing it because Natsu is a part demon, four hundred years ago there was a man named Zeref, he had lost his family to a dragon attack during great dragon war. He joined a magic academy, there he researched on magic, life and death, the instructors there tried to stop but he didn't stop, it got to the point where he was expelled from the academy but on the same day he was cursed by the God of life and death, Ankhseram. He was given the 'Curse Of Contradiction', it is the curse that affects the surroundings of the victim, the more the victim loves the life around him, the more it takes away life. The curse made him immortal so he created demons in hopes that one of them would kill him but that was not the case, every demon that he created was not strong enough. Then he came up with an idea, he revived his brother as a demon, the strongest of them all, E.N.D. He then came to me and asked me to raise his brother as my own and the name of his brother was Natsu Dragneel."

"He, one other human, Anna, and us remaining dragons then came up with a plan, since every remaining dragon was in the half-dead state and were not strong enough due to Acnologia, we planned to train several children and then travel through time to the future with them and Anna, where amount of etherion was in abundance so that we could gain our strength back and kill Acnologia if possible otherwise our children would. Before we came to the future, we sealed ourselves into our children to stop the dragonification."

"But there is more, if Natsu kill his big brother or a book named E.N.D. is destroyed then he will die as well since his life force is connected to them due to a demon seed in him. The only way to stop that is to destroy that demon seed but since most of my energy is used in stopping the dragonification and gaining my strength back, I am unable to destroy it." the red dragon explained.

"Hmm, then I can destroy it, since I don't have that much to do here but is there any way for him to use that power of his without turning into a demon and without any connection between his life force and his brother's and that book!" the old man asked.

Igneel thought about it for a moment, before he replied, "It might be possible, but it will be tricky and he will also become a fire demon slayer along with being a dragon slayer, he might even be able to become a lightning demon slayer as well."

"Then tell me what do I have to do and I will do it."

"I will tell you but we should do it somewhere else along with the unsealing, so that the human near him don't go into panic." Igneel paused for a moment, "Actually it might be a good idea to train him somewhere else."

"Alright then, I think it might be for the best as well." former shinigami agreed. "Now I think it is time for the boy to come here in person and meet us and I think it would be for the best if you tell him everything including his origin so that he can understand the burden that he is carrying."

In Real World

Unaware of the events taking palces inside his inner world, Natsu woke up when the sun rays hit his face. When he woke up looked at his surrounding and saw that he was in his house, suddenly the events of previous day came back to him. He also saw a sword at his side which was in a purple sheath, which confused him since he don't remember having a sword with him, the last thing he remembered was talking to a voice and after that everything went blank. Suddenly he was unconscious again.

Natsu's Inner World

Natsu woke up and saw that he was on a volcanic island, then he heard a voice that he thought that he might never be able to hear again.

"Its good to see you again you my son." Igneel spoke. Natsu turned toward him only to find that Igneel wasn't alone, along with him was an old man with a very long beard, wearing shihakusho and had a cane with him. The man was radiating an enormous amount of power, Natsu was sure that the old man infront him can crush the likes of Makarov and Gildarts easily without even trying, Natsu then turned his attention back to his father.

"Igneel where were you all this time, and where are we, please tell me." Natsu begged as tears were streaming down his face.

"It is a very long explanation and will take time so you might want to be comfortable." Igneel answered causing Natsu to look at him expectedly as he sit down where he was standing. Igneel seeing this explained everything that he told Yamamoto, by the time he was finished, Natsu was looking at him with a look of clear disblief, anger and horror on his face.

"So you are telling me that not only I'm part demon, I am also the brother of the most dangerous person in the history, that I am over four hundred years old and that you had sealed some of my powers which would have made stronger!" he asked.

"Yes!" Igneel said with a guilty expression on his face, he was feeling guilty because he thought that he should have told everything to his son a long time ago but he always thought he was a little too young to know everything about it.

Natsu seeing the expression on his father's face just sighed, he could never be mad at his father especially when his father was doing everything in his power to keep him safe and had also explained everything to him.

"Its alright I guess, even though I don't like it, you had your own reasons for not telling me but please no more secrets from here on." the young dragon slayer said. "And who is he?" he asked pointing toward the old man.

"I am Genryūsai Shigekuni Yamamoto though it is not my real name anymore." the old man said before he explained evrything to the young boy that he told Igneel.

"So you are a former shinigami and are now my Zanpakutō spirit and the sword that I found with me today was my Zanpakutō and both you and Igneel are going to train me and make me stronger!" he asked getting a nod from the old man. "So tell me what your real name is."

"So you think that you are ready to hear my name. If you think so then tell me are you ready to become strong, are you ready to go through all hardships to become stronger, are you ready to cross all the obstacles." the old man asked while releasing spiritual pressure on Natsu causing the boy to almost go down to his knees but he held on and looked at both his father and the old man with fire in his eyes and a determined look on his face.

"Yes I am ready to become strong and I will become strong whether you help me or not or whether I learn your name or not, I don't care." he said determined getting a nod of approval from both Igneel and Yamamoto.

"Very well, my name is Ryūjin Jakka." the old man said with authority in his voice.

"Its nice to meet you Ryūjin Jakka." Natsu said. "I will leave in little over a month from now, I have somethings to take care of here first." to which both of them nodded.

"I believe it is time for you to wake up." the old man said.

"Oh yeah can you tell me how much time has passed outside?"

"The time is irrevelant in here so you don't have to worry about much time passing in outside world." the old man replied causing the dragon slayer to nod before he left.

In Real World

When he returned to the outside world, Natsu got up from his hammock and left toward the bathroom to take a bath, after that he got dressed and straped his Zanpakutō on his back and left for the guild. When he reached the guild, he greeted everyone and went to the bar to eat something. While he was eating everyone asked where did he got the sword he simply smiled.

"It was a gift from Igneel along with this scarf before he left. When he gave me this sword he told me that I will know when I will be ready to use it but he warned me not to use it before that time." he lied to the whole guild but none of the guild member suspected anything.

He then spent his whole day with Happy and Mira, trying to console and get over the death of her sister.

When it was time for the guild to be closed, he stopped Makarov saying that he wanted to talk about something in private, causing the old man to raise an eyebrow before he agreed.

When there was no one left in the guild, the two of them made there way to Makarov's office. "So what is it that you wanted to talk to me about my boy?" the old guild master asked.

Natsu was about to reply but stopped when he heard his father's voice, "Natsu tell him to touch your forehead so that me and Genryūsai can bring inside your inner world and explain everything to him. It will make your story both believable and will also give you both privacy to speak freely without anyone overhearing your conversation." Natsu did as he was told and told Makarov to touch his forehead, the old guild master looked at him weirdly before he stood up from his seat and touched the boy's forehead.

Natsu's Inner World

The moment he touched the dragon slayer's forehead, Makarov found himself on a volcanic island but for some reason he wasn't feeling any heat even though the island was surrouned by a lava river. He then surveyed his surrounding but stopped when spotted a giant red dragon, an old man, who was way stronger than he ever could be, and Natsu standing.

"What is this place my boy and who are these two?" the old guild master asked, seeing that Natsu was standing with the dragon and the man in shihakusho without any fear, he decided that he shouldn't fear them as well since he trusted Natsu.

"This is my Inner World and these two are Igneel and Genryūsai Shigekuni Yamamoto." Natsu said

"Thank you for taking in my son when you did, I will always be grateful for that. And I was the one who told Natsu to tell you touch his forehead so that we can give you sensitive information and we don't want it fall into wrong hands and since no one can enter his inner world we can talk safely here."

"Its alright, he was just a child and I wouldn't have left him in the forest anyway. Anyway what did you wanted to talk to me about." at that Igneel and Yamamoto told the old guild master everything about themselves and Natsu along with the training trip, which they had decided to be one and half year long, that they had planned for the dragon slayer. After they had told the old master everything, he thought over the new information that had been given to him before agreeing with them.

In Real World

After everything was done, both Natsu and Makarov returned to the real world and then went their respective home.

For the next month Natsu spend as much time as he could with Mira in order to comfort, in one month he got more closer to the white haired beauty, much to the happiness of said beauty since she loved him in return but was afraid that he would reject her. In one month he helped her in everything he could including her magic. After the death of her sister, Mira had subconsciously suppressed her magic making it look like she had lost her magic but now she was once again able to use it after some encouragement from Natsu, he had helped her in anything he could, he had asked his tenants about her problem and got help from them, he even asked the old guild master for his help.

It took sometime but she was once again able to use her magic and had vowed to get stronger than before. There was also a massive change in her personality and her outfit, she was now polite and was always smiling warmly and was wearing dresses.

Natsu had taken both her and happy inside his inner world and had introduced them to his tenants, at first they were scared seeing the red dragon in his full glory but after some reassurances from both Natsu and Igneel they calmed down and talked with him. He even told them everything about his origin along with his plans for a training trip for one and half year, when they both heard about this trip they both tried to convince Natsu to take both of them with him but he said no and didn't budge from his decision. At first they weren't happy hearing about the trip but relented when he told them that he would return back and become even stronger than ever.

During the month, his Zanpakutō spirit trained him in contolling his spiritual energy while also training him in some Kido, and giving him the basic rundown on his abilities.

Right now Natsu stood infront of the guildhall and after he said his goodbye to his fellow guild members, whom both Natsu and Makarov had told that he was going on a trip to find Igneel because he had a lead and would be gone for an indefinite amount of time.

When he was ready to leave, Makarov stopped him and called him to talk in private and they went to his office, where the older gave him some books, explaining to him that these books will be good for him since they were written by him. In those books the old man had written his notes on light magic and was giving them to Natsu because he wanted the dragon slayer to learn light magic since it may come in handy in future.

After collecting the books and saying his goodbye to the old master, Natsu left the guildhall, when he was almost at the edge of the Magnolia, he saw Mira standing there waiting for him.

"Hey Mira." he called.

"Hey Natsu." she said before she engulfed him in a hug, resting her head at base of his neck. Natsu returned the hug while he stroked her hair.

"I will see you in a year and half." he whispered to her to which she nodded before she let go of him and looked directly in his eyes.

"Natsu there is something that I wanted to tell you." she said while looking at him nervously.

"What is it Mira?"

"I-" she paused befire she took a deep breath, "I love you, Natsu."

When she said that Natsu was stunned, he was looking at her with wide eyes and open mouth, he shook his head and regained his composure, "I love you too, Mira." he said, he wanted to say something else as well was cut off when he felt a soft pair of lips on his. He looked at her in surprise before he closed his eyes and returned the kiss and wrapped his arms around her waist as she wrapped hers around his neck, he licked her lips begging for entrance which she granted him, he plunged his tongue into her mouth causing her to moan as he wrestled with her tongue. They continued to kiss for few minutes before thdy had to broke it due to the lack of air, a thin string of saliva was connected to them.

They looked in each other's eyes before they separated from one another. Natsu then did something that shocked her, he took his scarf off from his neck and wrapped it on her neck before he kissed her forehead. "I want you to keep it. It is the most important thing in the world to me and I want you to have it and wait for me to return." he said, while giving her a peck on lips.

She snuggled into the scarf, taking in his scent, before she looked at him and gave him the smile that was reserved only for him. "I will wait for you till the end."

"Goodbye Mira, for now. I will miss you"

"I will miss you too." she said and gave him one last kiss before he left for his training trip.

He will become strong and protect everyone that were important to him. He will spread his name throughout the world and he made a vow to kill Acnologia and Zeref and avenge all the innocents they had killed.