User blog comment:Miskos3/Fairy Tail Chapter 385: The Celestial King vs. the Underworld King, Review/@comment-24536822-20140523164714/@comment-184.3.69.117-20140524000405

Hopefully its permanent. My guess is that its the same way Hibiki translated Urano Metria to her and said she can use it only once until she masters it. What I'm trying to say is that maybe she needs to train more for her to keep that ability. Also, Aquarius' magic to me seems for diff. than Juvia.