User blog comment:Miskos3/Fairy Tail 521: The Strongest Wizard, Review/@comment-81.247.58.85-20170211232521/@comment-7418318-20170215071434

Erza just summons existing sword from a storage place, rather than creating them through magic, so I don't think that would make sense. The only magic we know she possessed by herself without any holder items is telecinesis, but how would that couple with Urano Metria? Maybe a ball of pure kinetic force or somesuch.

I'm actually hoping (against hope probably) that she'll be out of the fight for good for the rest of this arc... but yeah... no way that'll happen. Going by this arc, she could have her body scattered on the sub-atomic level and Hiro would still have her joining and winning the fight. -_-