Natsu Of The Sharingan

"Speaking"
'Thinking'
"Whispers"
"SHOUTING"
"Attack"

"What is it Natsu?"

"I want to give you this sword, it has a bit of my fire dragon slayer magic in it, don't worry it will regenerate by itself so it won't drink my magic, the attacks are "Fire dragon sword art" I will write a list of the names for you, but for now goodnight and we'll do sword wielding tomorrow!"

"Roger"

-In the morning-

"Wake up… Wake up" A old man said while poking Natsu

"Alright… Wait! who are you?!"

"My name is Hagaromo Otustsuki, The sage of six paths, I am here to train you, you took after my son Ashura, he was kind, I am here to grant to power."

"Seems like it's a trick, and what's wrong with your magic? I sense something really powerful yet it doesn't feel like magic"

"Ah, I see you already noticed, I come from a different world, We use ninjutsu, genjutsu and taijutsu, we use chakra not magic, I am here to train that power inside of you as well as make you my descendant, since I am dying"

"Got it gramps!"

With that Happy woke up and Natsu explained everything to the blue feline, The sage agreed to train Happy in sword arts and wind magic, they got everything set up, and started to train.

Happy was given a sword regiment to do by himself while he trained the chakra inside of Natsu, building up his chakra container to the size of his magic container and all those things, then Hagaromo explained his 2 eyes, the Sharingan and the Rinnegan, he explained the Mangekyo Sharingan and Eternal Mangekyo Sharingan, he explained the downfalls of using it too much.

Natsu listened to all this very carefully and wanted to learn all this amazing power, but first he needed to learn the basics of chakra control, how to walk on water, climb trees and all those things, then Hagoromo sealed all 9 tailed beasts inside Natsu as his descendant, he quickly became friends with them, especially Kurama since Natsu reminded Kurama of Naruto.

-2 years later-

Hagaromo explained the powers of the tailed beasts and their modes, from there they just practiced entering each tailed beast mode and controlling their powers. Happy was now really good with the sword and learned re-quip, Natsu was still working on chakra but was amazing at using magic, they continued this again and again each day before Hagoromo came to them one day with some news.

"Natsu… I am here to give you my 2 eyes The Sharingan and Rinnegan, We will have 1 year for you to learn how to use them before I will have to take my leave, my 2 eyes are the strongest Sharingan and Rinnegan, but you have to make sure you cover your Rinnegan unless you want to use it since you once you have the Rinnegan you cannot hide it like your Sharingan."

"Gramps, then how will you see?" asked a worried Natsu

"I have 2 extra eyes after I do one of my transferring jutsu's just help me transfer a normal eye, I will also grant you my power as the sage of six paths, since you have mastered sage mode"

"Got it"

They transferred the eyes and went to bed.

-In the morning-

"NATSU! it is time to learn how to use your new eyes" Hagoromom shouted

"Coming Gramps! just give me a moment to wake up Happy!"

Hagoromo, Natsu and Happy were all training before Hagoromo suggested something for Natsu

"Natsu, you are now 23 years old am I right?"

"yep, anything wrong?" Natsu replied

"Well I have this Jutsu I can teach you it reverts you back to 18 years of age but you still have the same powers as your 23 year old self, it can be used anytime you want as well!"

"OOHHH! teach me!"