User blog comment:FairyRaven/Fairy Tail Chapter 349: The Demon Doriate, Review and Commentary/@comment-203.87.139.100-20130830102207/@comment-16336969-20130830174245

Off or on-screen acuring new form will mean she will replace with it her current all time used form. I not fell good thinking it would mean she start use another form. But if we could see some flashback how she gained one of two laready possesed forms would be not bad to. Or it wouldn't satisfy you?