User blog comment:Bluefox87/Chapter 416 Natsu is E.N.D...WHAT?!?/@comment-74.100.44.97-20150121035445

Well with Natsu being E.N.D confirmed to be true, it kind of makes sense why Acnologia showed up at the island, he might of been after Natsu. I mean at tenrou Natsu encountered Zeref for the first time since he was created, might of triggered E.N.D subconsciously since all his demons were created to kill Zeref and Acnologia sensed it. Not saying that he knew it was Natsu directly, he probably just sensed him. Anyways when he showed up at Tartarus it was because he feared E.N.D resurrection (Igneel and Mard Geer said it not me) and Natsu being so close to the book and also the fact that he was at Tartaros HQ which is Zerefs Bookshelf might of triggered E.N.D again and Acnologia sensed it again. I mean think about it after everything that has been revealed, why did he randomly show up the first time?

This is just a thought, poke holes in it but like I said its just a thought.