User blog comment:FairyRaven/Fairy Tail Chapter 370: Demons Reincarnated, Review and Commentary/@comment-7418318-20140208093159/@comment-213.89.161.219-20140209203700

i hate to be the one to suggest this. but thier agilty may have soemthing to do with thier magic. and since they cant use magic they cant use full agility. if so, I say its bull. but then they should have power to break thoose chains with thier bare hands if they have the strenght. so I think a lot of it comes from magic thier endurance and durabilyt too.