Chapter 1: Time travel, God and new Powers?

Unknown location

Natsu feels like he's floating in a sea of darkness. He can't see anything and can barely even move. He keeps floating for a while till he sees a light burning a deep crimson. He heads towards it with a feeling of familiarity.

Slowly the light envelops him and then he hears a voice. The voice is soothing as Natsu relaxes a bit after hearing it but not being able to make out what it was saying feeling strangely comforted by the voice he asks "who are you? And where am i?" the voice seems to get closer and louder as he hears the voice say, "My name is not important right now as for where you are i have pulled you over into my dimension before you reached the afterlife."

Slowly he starts to remember he failed, and everyone died. He frowns and starts tearing up remembering what happened when suddenly the voice speaks to him again "All is not lost young one" "what do you mean?" Natsu asks "I mean I can send you back in time to back when Igneel was training you and you can grow strong enough to protect them. Also, in order to help you out on your journey ill grant you my mark with this you'll be able to use all forms of fire slaying magic such as Devil, God and even Phoenix slaying magic."

Fascinated Natsu asks "How many slayer magics are there?" to which the voice responds saying "I can't hold this connection much longer so you'll have to discover for yourself, also due to the way the celestial spirit world works it is likely that your mate will also remember the current timeline" Natsu blushes a deep shade of red before a flash of light blinds him and he falls unconscious.

Year x371: Igneels Cave

In a cave Natsu suddenly wakes up as a kid next to Igneel and starts crying as he tells Igneel everything that happened and asks for harder training and help with his new magics.

Although skeptical at first Igneel then notices the mark on Natsu's left forearm it is Two black dragons coiled around each other surrounded by 8 different flames 1 purple, 1 black, 1 crimson, and 1 blue the rest are a dark grey with a black swirl starting in the middle and spiraling out. He can also feel Natsu's magic power which is way higher than before so he can guess its Natsu's power from the future. He then says, "Alright son, stay here while I try and find you some teachers to help with your other magic."

Several hours later

Natsu is currently meditating in order to try and expand his magic container by releasing and controlling the flow of ethernano in the environment into and out of his body. Suddenly Igneel returns landing at the entrance of the cave followed soon after by a large blue bird made of fire which Natsu guessed was a phoenix and a humanoid demon with dark purple markings all over his body and covering the lower part of his body like pants however the thing that caught Natsu's attention were the dark purple horns spiral out of the sides of his head amongst his silver hair and the fact the markings lead to his hand and feet which appear to be made of the markings and in the shape of claws his eyes are red with black instead of white.

Natsu walks towards them and politely says "Hello. My name is Natsu Dragneel." The phoenix replies with a gentle female voice and says "Hello Natsu, my name is Fye Igneel informs us that you were gifted all fire slayer magics from the god of fire and need help learning about them."

the demon asks, "What happened in the future that required the God of Fires intervention." Natsu replies "Acnologia" this got wide eyes and gasps out of them as they weren't expecting that. Natsu bows then continues on to ask "please help me get stronger i don't stand a chance as i am now however i have to stop him in order to prevent the tragedy that is my past" The demon speaks next "Well if were going to train you i guess i should tell you my name its Kasdaya by the way nice to meet ya."

2 years later

Natsu has mastered the basic moves for both phoenix slaying magic and devil slaying magic. He also has started creating new moves for both as well as his fire dragon slayer magic, as well as adapt his body to take on properties of the species who taught him his magic such as phoenix form the ability to turn his body into fire to resist or nullify certain attacks, Dragon force the ability to turn his skin into scales and heighten his senses(he can also conjure the scales at will without entering dragon force) and last but not least the ability to transform into a demon with features such as wings, a tail and claws.

That's not all that has improved, he also had a bit of a wardrobe change instead of his old outfit he now has an enchanted outfit that is immune to fire and will grow as he grows. The outfit consists of black combat boots and dark grey pants that tuck into his boots and have a crimson flame pattern at the bottom he has a grey muscle shirt and a black jacket with the same flame pattern on the bottom of it.

He also has crimson sword made of Igneels scales and enchanted by Fye to be able to grow with Natsu as he gets stronger, he'll be able to unlock new abilities with his sword, Kasdaya also used a curse to make it so that only Natsu can use the sword without being burned. The sheath itself is also made of Igneels scales and is a tan color like Igneel's underbelly.

Natsu is currently doing his morning exercise routine when he sees what appears to be a small girl with big gold wings that shine with a faint glow hiding behind a tree and watching him Natsu says in a soft voice "come on out i won't hurt you. My name's Natsu, what's yours?" she flies closer while still maintaining her distance and replies "My name is Faera I'm a fairy. Are you the one who received the god of fires mark?"

"Yes"

"So you're the one he asked me to train in fairy magic."

Natsu tilts his head in confusion "he?"

"The fire god asked me in a dream to train you in fairy magic. Unlike other slayer magics, fairy magic isn't typically used against fairies but rather dark magic and undead."

"Oh ok, Thanks. I look forward to learning from you." Natsu says with a smile.

And so Natsu continued to train his devil slayer magic (and other things such as swordsmanship and his own curses as E.N.D) under Kasdaya, his phoenix slaying magic (including healing spells and enchantments) with Fye, his fairy magic with Faera (including the ability to mask his magical presence) and with Igneel he has finished his normal dragon slayer training and is working on fire dragon king slayer magic.