User blog comment:FairyRaven/Fairy Tail Chapter 302: The Eclipse Plan, Review and Commentary/@comment-5201441-20121004132839/@comment-5201441-20121004204308

As the Eclipse thing was a failure (Natsu goes to the past and can't defeat Zeref), she wants to prevent it from happening and actually bring someone from the past to help in the fight now.

As things are like now, they couldn't have suceeded in killing Zeref, so she, from the future, comes to prevent it.

And what about that Lumen Histoire inside Fairy Tail?