User blog comment:Miskos3/Fairy Tail 542: Instinct, Review/@comment-26099879-20170705184556/@comment-7418318-20170706074637

I wonder if that curse is even still there. Lucy did some extensive rewriting to sever his connection with the book of E.N.D. I wouldn't be surprised if the method to do this had been to remove his Demonic side altogether and turn him into a regular Human (or as regular human as a Dragon Slayer can be).