User blog comment:TheCarrotSaysYumYum/Dragons, People and Demons.../@comment-5580383-20130607190629

Sorry for late  comment  response  ,been busy. Before i comment on this review, can you tell me how to get those customized blog platings.

Now to the review

But it's been proven so far that even the strongest mages like Marakov and Mirajane and even Gildarts are no match for dragons. Besides given they're are alot of dragons that hate humans, it's pretty  hard to see how  alot of humans would've  survived the dragons.

Zeref created the demons so that's a good explanation for how the world was overrun by  demons right there. Also it was explained dragons  existed for over 400 years and have very long lifespans compared to humans.

Also Acnologia was the one said to be purging dragons as well to become more powerful to the point he became a dragon and was explained shortly before Zeref terrorized the entire world, dragons were having a civil war between each other and the humans were taught Dragon Slayer magic by the pro human dragons to help fight against anti human dragons  and one of the humans eventually  turned on the dragons and start killing them off. It also makes sense if Zeref, the one who helped created Acnologica himself was also using his army of demons to hunt down and exterminate dragons which would explain why demons like Deloria were still roaming the earth even around Gray's time ( R.I.P  our  favorite ice wizard ). Deloria could still be hunting down surviving dragons from 400 years ago

You're theory regarding Zeref also makes sense in context. The question still remains how Zeref knew Natsu and  said that he was still not strong enough to kill him but it  definitely adds to the connection that he could only be killed by Dragon Slayers  given they're said to be the strongest of all humans. Mavis being a Dragon Slayer is a tad far fetched and  bordering  fan fiction   but then again we can't be certain about her nature of her powers, my only  question is why she still needs to use the bathroom if she's still a ghost.

Then again, given not much is known about Mavis or her powers herself and given Dragon Slayers can still use non Dragon Slayer magic such as Laxus using astral projection or Fairy Law, it can still be a possibly that Mavis was a Dragon Slayer.

I'm actually digging the theory behind Lumen Histoire, it was actually  a well done analysis on the nature of  Mavis light powers and  Zeref's  dark powers and this does beg the question of their connection  with each other and Tenroujima  itself.

It's also a pretty good reason  and explanation to Mavis  leaving Fairy Tail and  how Purehito becoming 2nd guild master and   good  explanation to how Hades based his powers around   Lumen Histoire   and  explains how Mavis  died but still doesn't explain why she still looks as young as Wendy  XD.

Also it makes  sense that  God Slayer Magic  derivatives from  Zeref's dark magic and n why dragons would come to  fear this type of magic. Also the theory of Layla  Heartfilia accidentally sealing away the remaining pro human dragons  and later dying from the overuse of  magic  would also make sense given Magic is also lifeforce energy alot like Ki, Haki, Chakra and Reryikou are. This would further make Lucy far more relevant within the plot  and explain her  vast potential power.

Going by age and timeline, Marakov was 3rd guildmaster long before Layla was  born in  X748  whereas Marakov was born  within  X696, Marakov was within his middle ages when the 2nd Guildmaster stepped down  so he was guildmaster before Layla was even born so the chronological order of events with  Laya sealing the dragons is a bit off.

It would take 30-40 years before Dragon Slayers became part of Fairy Tail.

Also excellent  theory of  Acnologia  roaming the earth. Also the  theory behind  Zeref's motives  actually makes sense in how he wished for  death from Dragon slayers.

But then, Mavis uses her powers to bring back Zeref's chance of hope. She saves her Mages on Tenrou and joins them back at the guild. However she doesn't know about Zeref or where he is, so she merely tags along with FT to watch over them.

Most if not all your theories make sense to what's established with the plot. a few chronological  errors here and there  but  mostly a  solid theory. You're the Nostradamus of Fairy Tail predictions.