User blog comment:IamJakuhoRaikoben/Chapter 405: Tartarus Arc: Part 6 - Magna Carta, Review./@comment-24911572-20141021211141/@comment-83.255.195.39-20141021231055

It seems like all of Zerefs demons use curses instead of magic and maybe Zeref does too. Or maybe he uses so powerful magic that Face wont affect him.