User blog comment:IamJakuhoRaikoben/Chapter 451: Fairy Heart, Review./@comment-24963954-20150907103559/@comment-25962249-20150907104310

I don't think we have a clear view of how strong the curse is.

As far as I am aware Dragon Slayer Magic is the only form of Magic that can pierce through a Dragons skin, regardless how powerful the magic is. -- And to be fair... he isn't just any dragon... he is the king.