User blog comment:Miskos3/Fairy Tail 534: The Door to the Vow, Review/@comment-24039234-20170429161846/@comment-24546844-20170430004745

It does make sense in a way. If I remember correctly he idealized the Eclipse before creating the demons so maybe he could have used the CS as a starting point, so yeah if this is right Lucy may have some life-link magic proficiency. I doubt Hiro will try to explain this at this point though.

Alternatively maybe watever is happening to Lucy now started before she started rewriting the book so it's not herself doing it. Also, the next chapter is named "The strongest power", assuming this isn't some love/nakama power bullshit,if this is something related to the Ankhseram curse I don't know how I'd feel about it.