User blog comment:Miskos3/Fairy Tail 511: The Hell of Starvation, Review/@comment-130.105.140.154-20161119160707/@comment-7418318-20161119231553

There are so many ways in which this might be reversed.


 * 1) It might wear off once Irene get's knocked out.
 * 2) Irene might retract the spell either due to being turned by Erza or as a condition for Alvarez surrender.
 * 3) Mavis, one of the Wizard Saints or... anyone else really might find out how to undo it.

Or maybe they'll go on another short in-between arc to find a cure for her, before heading to the last showdown against Acnologia... IF it turns out this is not yet the last arc.

But when it comes to stuff that Irene did, that needs to be reversed, I'm much more interested in the peninsular. Irene did mess up the entire landscape and that's not something anyone other will just be able to undo.