While Mira teaches Lucy, Natsu, and Happy basic Transformation Magic, Erza does her own transformation while shopping... into Fairy Woman! And a superhero may be just what's needed when two other Fairy Tail members are turned into supervillains!
If it is, daily stress has shaped 
the Transformation Magic, probably.
إن كان كذلك، فقد تشكّل سحر التحوّل
من الإجهاد اليومي على الأغلب