User blog comment:Miskos3/Fairy Tail 534: The Door to the Vow, Review/@comment-71.120.223.31-20170428174054/@comment-5303512-20170428184156

@ But what does that to do with Lucy, when you think about it, if Lucy either intentionally or unintentionally took Zeref's place, then she should not be in pain cuz she would be doing the same thing as Zeref. But if she took the books place, she should take whatever is inside, which would explain why Igneel warned not to open the book.