User blog comment:Wrath022/Chapter 517: Wendy Belserion, Review/@comment-29778526-20170115065204/@comment-29778526-20170116015221

@Wrath22 Exactly with her level of power the power of her dragon slaying spells must be devastating, we saw how corned the Historia of God Serena got them by using his slayer magic so for Eileen should be even easier. Maybe is what you said her pride and hate for what Dragon Slayer magic did to her, that she refuse to use it.

I remember how easy Eileen took Mira down ( who is supposed to be as strong as Erza ) when she was in a weakened state like Erza and Wendy where before their fight with Eileen.