User blog comment:FairyRaven/One-time-only Spells/@comment-4829046-20120709125603/@comment-5268982-20120709130500

Wouldn't Fairy Glitter be just as useless though, since it looks like it only targets 1 enemy? For example, how did Cana plan to defeat all those monsters in the festival, had Erza not defeated them all by herself? Sure, Fairy Glitter would be enough to kill one of them, no matter how strong it was, but other than that...would her card magic suffice? Since Mavis entrusted it to her ESPECIALLY for defeating the monsters at the dungeon, one would say that Fairy Glitter can be more useful than what it looks like...except if Mavis can foresee the future, and so she knew what Cana would compete at.