User blog comment:IamJakuhoRaikoben/Chapter 446: The Land Abandoned By God, Review./@comment-98.124.175.148-20150729032910

Ok people, I have a theory.I think that Spriggan uses two powers aka both curses and magic instead of just using magic.That's why they are too op.It was said that ishgar's four top magician are not human, Same goes for Master Hades who came too close to the depths of magic and was said to be closest thing to a demon by tartaros.then -If it's true that they are God Serena's equal then all of them shouldn't be human but they look like one.So, It must be that they uses two power sources to stop turning them into inhuman.

-Zeref is cursed and he also uses magic and he probably taught these Spriggans himself.

-All of the Spriggan members looked very calm standing next to zeref and even were talking $#it without a care.There must be a reason for that.Only way i can see Zeref's curse not killing them is cause they themselves are cursed themselves.If not then they would be taking precautions going near to Zeref like the old minister guy who was playing cards with Makarov.