User blog comment:IamJakuhoRaikoben/Chapter 355: Song of the Fairies, Review./@comment-6299840-20131011225313/@comment-7418318-20131012213832

When Erza's powers awakened she practically turned the zeref cult mages into pincushions. While we don't get anyone shouting that she killed them, it is very unlikely that none of those mages was killed in that razorstorm of flying weapons.

And the freed slaves wouldn't have wasted what little bandages they had on their tormentors when so many of their own were hurt, so the surviving hostiles had a good chance of dying from their wounds due to lack of treatment.