User blog comment:Ncduru/The Erza-Irene Connection/@comment-27792306-20160425124542/@comment-7418318-20160429202421

Erza's "original" magic had nothing to do with armour or swords and wasn't holder magic.

It was telekinesis. She magicall picked up anything that was a weapon due to her needing weapons in that instant. And that was caster magic for sure, as is re-quip itself.

Sure her magical armours and swords are holder magic, but re-quip - the way in which she stores and retrievs those items itself - is caster magic.

Then there's also this change in her eyes which dispelled/scared away/destroyed the Historias... that might be magic too and if it is, it's caster magic too.