User blog comment:FairyRaven/Fairy Tail Chapter 377, 378: The Sky Dragon's Rage & Friends Forever, Review and Commentary/@comment-24066070-20140328110449/@comment-7418318-20140328111627

So Carla is a miniture Warhammer 40K-style Farseer?

That's certainly better than seeing a sure future, but we already knew it from her prediction of Lucy crying in the collapsing Mercurius not coming true.

As for the prediction coming out of nowhere... while I too would have prefered some cryptic incomplete foresights that we would only understand at this moment, I don't think it's a problem. She did predict that conversation between Macao and Wakabe just seconds before it happened. While this might be of a FAR bigger magnitude (what with sifting through multiple possible futures and the fate of the entire continent hanging on her ability), it's still technically the same as she did back then.