User blog comment:Lord Zeref Dragneel/Is there anything more powerful than Fairy Heart?/@comment-26451407-20151130081045/@comment-1153699-20151130103810

I don't thinks so. He should be pretty close to their level while using his own DF, but without outside help, his time in that form is very limited. Not to mention he'd probably be exhausted afterwards.

Whatever he has under his arm could be a game changer but I'm not sure. Once END gets released though, neither of them would stand a chance.