User blog comment:FairyRaven/Fairy Tail Chapter 353: Exorcism, Review and Commentary/@comment-7405046-20130927131647

So the cool-sounding God Slayer Magic can be learned by reading a book. I guess Mashima wants to make Demon (or Devil?) Slayer Magic the most epic of the three slayer magics and had to downgrade God Slayers somehow, but that's going a bit too far, isn't it?