User blog comment:FairyRaven/Fairy Tail Chapter 335: The Time of Life, Review and Commentary/@comment-5840892-20130614190903/@comment-1359322-20130615051032

No one read Levy's explanation did they. Levy explained that the Nakagami Armor uses a large amount of magic to activate/wear/equipped but those able to do it can bend the law of magic. Erza removed the drawback with her second origin but then it also used up all her magic power, she can't even requiped one magic sword after using it.