Could be the book contains the power of END or is the seal that keeps END locked up inside Natsu.
Interesting theory but we already saw acnologia battling what would probably be E.N.D.
Natsu being both of them is simply off and acnologia doesn't use fire magic which are the basis of both Natsu (Fire DS Magic) and E.N.D (Fire curse).
Not to mention, acnologia killing End or Natsu in that scenario would simply result in his death.
I don't recall seeing Acnologia fighting END. If you mean the Dragon Festival poster, it's a flame mage, if it's really Natsu it still means big time travel or END suddenly falling asleep inside Natsu. Acnologia's magic is a fair point, that can be changed tho, I think. He bathed in dragons' blood and absorbed their powers, or somehow he powered up as Dragon Slayer. When he mixed it all up he got that... laser? It looks like pure energy, no particular element. Natsu already started mixing elements up, he has his Lightning Flame mode.
Yeah. The END thing is a bit confusing but I believe the demon part was simply sealed separately.The whole "Etherious Natsu Dragneel" makes me wonder if it's a demon INSIDE of Natsu or another Natsu in a book. Maybe Igneel fought END in the past, couldn't kill him but managed to somehow seal the demon part of him back into the book, thus leaving little Natsu, taught him DS magic and boom. Wouldn't explain Natsu being so old. If he was END then he must have been alive 420 years ago. Or Zeref got to know Natsu and other DSs, made END taking Natsu as a model because Natsu was so awesome. Grabbing straws here. Mashima will figure something out, time travel and stuff will be strong in this. Rave Master had single woman creating whole another universe and going back in time, meeting skeleton of a man who in the future went to the past and more fun stuff...
We have canon statements to support that:don't think we EVER saw END's magic/curse. There's nothing that backs up theory that the mage from the poster is END. For all we know Igneel fought END, not Acnologia. And even if Acnologia killed Natsu/END it wouldn't result in his death at all, as Natsu/END would be from another timeline. He'd have just existed in his own timeline and killed his double(s).
Tell that to Mashima. We already had time travelling with dragons. FT is a lot like Rave, so I'm sure there will be some serious time travel involved.It might not be time travel. Personally, I'll prefer if it isn't. Time travel complicates things.
If he is Natsu it's not surprising he uses fire. Not even a fire curse.We have canon statements to support that:
END uses fire and he also invented curses hence why I said he uses fire curses. The demons use curses instead of magic (also canon).
Yeah, assuming it's not separate dimension, timeline. It can be easily explained with a tree-like structure. Acnologia killing END wouldn't kill him simply because it wouldn't have affected his timeline at all. The disappearance of Natsu wouldn't be far enough on the tree. Rogue came from the future, so killing Rogue that he originated from would kill him. Okie dokie. But if Acnologia existed in his timeline, killing something he didn't originate from wouldn't do shit to him. Imagine you were sitting on a tree... Or screw it, I'll use my awesome paint skillz!No, killing the past kills the future. That's why ultear wanted to kill current rogue so future would die but that was an evil way to solve the situation. Also why future rogue wanted to kill the present Lucy and he specifically warned the dragons not to harm present rogue. Its killing the future that has no repercussions except a different future panning out but you cannot kill the past while the future remains.
Yeah, assuming it's not separate dimension, timeline. It can be easily explained with a tree-like structure. Acnologia killing END wouldn't kill him simply because it wouldn't have affected his timeline at all. The disappearance of Natsu wouldn't be far enough on the tree. Rogue came from the future, so killing Rogue that he originated from would kill him. Okie dokie. But if Acnologia existed in his timeline, killing something he didn't originate from wouldn't do shit to him. Imagine you were sitting on a tree... Or screw it, I'll use my awesome paint skillz!
http://scr.hu/1ggv/mtz31
So, as we can see, if Acnologia killed Natsu he would kill the future on the right side, his, left side, future would remain unchanged, as he didn't originate from this Natsu. Of course, the question remains if you can send someone to another "branch". Mashima did split the universe into 2 separate timelines before so...
And I even made a cute tree. If Natsu became Acnologia, then only killing Natsu from his timeline (left branch) would kill him. If that Natsu came from right branch it doesn't matter, he'd end the right branch Acnologias/ENDs. This cute tree even explains Rogue and stuff in this reasoning. :vWell this is how the timeline you proposed goes:
Natsu becomes END, in another timeline END morphs into Acnologia. Thus you assume that Natsu being killed has no repercussions in regards to acnologia?
If so, then no, that's not accurate.
The thing is Natsu is still the past. Therefore, without natsu there's no END and without END there's no acnologia. Acnologia cannot be the past because END precedes him and Natsu precedes END.
Sorry but I didn't really get the tree.And I even made a cute tree. If Natsu became Acnologia, then only killing Natsu from his timeline (left branch) would kill him. If that Natsu came from right branch it doesn't matter, he'd end the right branch Acnologias/ENDs. This cute tree even explains Rogue and stuff in this reasoning. :v

Look at the treee. Acnologia is still in his timeline, he is Natsu from 400 years ago, so killing Natsu from another timeline (where he haven't become Acnologia yet) wouldn't kill him. It's all if it looked like on a tree. IF Natsu that was sent from the past was from this timeline, then... well, logically Acnologia wouldn't exist, right? He wouldn't have become Acnologia as he was sent to the future, so he's our Natsu. So the only possibility is for Natsu to come from another timeline. Or Natsu comes back from his lil' trip, goes back to his time (400 years ago), and THEN becomes Acnologia. That's why travelling to the future is tricky, unlike travelling to past. -.- In this scenario, Acnologia killing Natsu would also kill him, as Natsu wouldn't be able to go back to become Acnologia. Oh fuck that, I'm done, I'll think of more plausible theory when I go to the toilet, maybe discussion will go somewhere then. -.-Sorry but I didn't really get the tree.
I still don't see the difference. These different timelines trace back to Natsu himself. You said the past natsu was sent to the future, which is after he had become END and also after END has become Natsu. Or did I miss something?
Don't write as if "Etherious" coming from Aether was a fact. Etherious is a race of demons that come from Books of Zeref. They have even Etherious forms, like Mard Geer with his Batman thingy. And I swear to god, those demons were not good, they were evil as hell.It is obvious that Natsu existed at the same time as Zeref and Acnologia. The painting shows us fight between Natsu and acnologia. I think about something. If Natsu and Acnologia were equal in power Dragon Slayers, so they were rivals but after Acnologia was turned into dragon he became stronger and evil so to defeat him Natsu had to gain power and he took offer from Zeref. Zeref turned him into demon dragon slayer and the price for that was promise that Natsu will kill Zeref. We dont know what kind of being is Etherious Natsu Dragneel. Is he good or evil? For me he is good because his name etherious comes from god Aether, the god of light and air.
Ok, I'm lost. Acnologia in your theory is the past?Look at the treee. Acnologia is still in his timeline, he is Natsu from 400 years ago, so killing Natsu from another timeline (where he haven't become Acnologia yet) wouldn't kill him. It's all if it looked like on a tree. IF Natsu that was sent was from the past was from this timeline, then... well, logically Acnologia wouldn't exist, right? He wouldn't have become Acnologia as he was sent to the future, so he's our Natsu. So the only possibility is for Natsu to come from another timeline. Or Natsu comes back from his lil' trip, goes back to his time (400 years ago), and THEN becomes Acnologia. That's why travelling to the future is tricky, unlike travelling to past. -.- In this scenario, Acnologia killing Natsu would also kill him, as Natsu wouldn't be able to go back to become Acnologia. Oh fuck that, I'm done, I'll think of more plausible theory when I go to the toilet, maybe discussion will go somewhere then. -.-
Ok, I'm lost. Acnologia in your theory is the past?
This was how I saw it: acnologia exists because END morphed right? Acnologia morphed 400 years ago and has lived on from then without time travel.
Acnologia is basically Dragon END. End is basically demon Natsu. Igneel sent Natsu from the past to go to the future where acnologia already exists or acnologia went to the past?
We also shouldn't know ANYTHING about the future. If more Dragon Slayers went on rampage Igneel might have wanted to avoid this future for Natsu.In the timeline with igneel and Natsu, they wouldn't know about acnologia. The only way they would, is if one of them traveled to the past. Time travel doesn't affect appearance though. Past remains past even when existing in a future timeline and vice-versa for future/present.
Because Igneel that sent him isn't from this timeline. We have Igneel and his child, Acnologia. Of course it wouldn't explain how Igneel can just kill him when he couldn't kill END because of the very same reason, because it's Natsu.Ok, logically speaking, igneel can't know about both natsu and acnologia. For him to know acnologia, that means Natsu already transformed and igneel has no way to relate with Natsu unless he (igneel) travels to the past. Alternatively, acnologia could have traveled to the past (which has no benefits or meaning). Only way, for both Natsu and acnologia to exist at the same time, is acnologia (future natsu) went to the past where Natsu is still human. Either way, without Natsu himself, acnologia doesn't even exist.
Tree?Also, if Natsu was sent to the future before becoming acnologia then acnologia doesn't even exist. I mean, natsu would have skipped history thus morphing into acnologia never happens. For acnologia to exist, Natsu has to remain in his timeline. If acnologia traveled to the past, then he is still killing Natsu who would have become him (acnologia).
(( Of course there can be a timeline where Natsu hasn't become Acnologia YET.There can't be a separate timeline where acnologia doesn't come from Natsu. For acnologia to even interact with Natsu, he has to travel to the past, which is why he would still die.
Well, let's leave that.Told you I'm done and you still... xd But all that bullshit aside. We know Igneel taught Natsu dragon slaying magic like 20 years ago, then he disappeared after the fight with Acnologia. How can we make any of that work now? :v Man is this poster can't be Natsu because Igneel found him 20 years ago, unless it's END. But then it wouldn't explain why Igneel couldn't kill END. Unless END vs Igneel fight happened just before Igneel disappeared. Or Natsu just suffers from 400 years worth memory loss, we also saw it happen already in Rave (not 400 years tho).
So 400 years ago Igneel fought END and didn't kill him for other reason than it was Natsu, and Natsu is found 400 years later by Igneel. Who's the flame mage in the poster then?Well, let's leave that.![]()
My opinion: Igneel fought END and couldn't kill him (for whatever reason), END gets sealed (well the etherious form itself). The Magic causes Natsu to lose his memories and return to a child form. Or more accurately maybe Natsu returned to a child form because that was the only time he was not END.
Anyway, after seeing Natsu like this, Igneel feels leaving him would result in him eventually becoming END again and so decides to take him in and teach him DS magic, hoping he wouldn't need to resort to END's power again. Or maybe he taught him DS magic to help him defeat acnologia.
Not saying igneel fought ENd 400 years ago. Igneel fought him later at an unspecified time and failed to kill him. Instead END gets sealed and Natsu sleeps for a pretty long time.So 400 years ago Igneel fought END and didn't kill him for other reason than it was Natsu, and Natsu is found 400 years later by Igneel. Who's the flame mage in the poster then?
But Acnologia must have won his fight against man in the poster, presumably END. So END survived, and THEN was beaten by Igneel and sealed? END is a failure dammit, the most powerful demon ever didn't even win one fight. Or maybe Acnologia was so weak END lost interest, and END wasn't sealed because he was beaten and he is crazy strong, who knows. We can expect this cliche ending with Acnologia fighting Natsu and Natsu winning. I don't think Zeref will be the final villain, Mashima gets wet on 2 boys with the same background, one gone good and one gone bad fighting over their ideals. I guess he will go with Zeref vs Mavis (Lumen Histoire). :vNot saying igneel fought END 400 years ago. Igneel fought him later at an unspecified time and failed to kill him. Instead END gets sealed and Natsu sleeps for a pretty long time.
Igneel is aware that he is Natsu (human END) and has been with him the whole time.
Flame Mage in the poster is END fighting acnologia before he fought igneel and before he got sealed.
My guess is that END in a way was evil, maybe not completely but evil enough. That's probably why Zeref is so cryptic about Natsu choosing or how he deals with END. One key to understanding this whole fracas is knowing Zeref's capabilities. Was he able to seal Natsu or END somehow, and did he rename END after Natsu was born? Did Zeref seal away the demon part and have Natsu be reborn or transfer his spirit or soul to a fetus or baby or did he reverse time for Natsu and made him a baby again, but sealed away his demonic power and maybe his memory? If Ultear can reverse time, Zeref should be able to as well without an issue.It is obvious that Natsu existed at the same time as Zeref and Acnologia. The painting shows us fight between Natsu and acnologia. I think about something. If Natsu and Acnologia were equal in power Dragon Slayers, so they were rivals but after Acnologia was turned into dragon he became stronger and evil so to defeat him Natsu had to gain power and he took offer from Zeref. Zeref turned him into demon dragon slayer and the price for that was promise that Natsu will kill Zeref. We dont know what kind of being is Etherious Natsu Dragneel. Is he good or evil? For me he is good because his name etherious comes from god Aether, the god of light and air.