User blog comment:Miskos3/Fairy Tail Chapter 490: Fairy Tail Zerø, Review/@comment-192.206.56.1-20160620155411

OMG! How did Zeref actually come about to knowing about Fairy Heart? Maybe from Ivan? Or. . . maybe Eileen is really Erza from the future. Erza became the guild master and came to know about Fairy Heart. Perhaps she came from the future where Acnologia defeated everybody and found a spell for time travelling. She decided to travel back and side with Zeref to obtain Fairy Heart in order to defeat Acnologia. That can explain why she refers Universe One as a magic of the "new era".