User blog comment:FairyRaven/Fairy Tail Chapter 329: Seven Dragons, Review and Commentary/@comment-5871436-20130501012442/@comment-1776824-20130501022814

Dragons aren't weak. As you could quite plainly see, everybody, including the Dragon Slayers, was having a hard time against them. They are Dragons: beasts that are feared for their ferocity; former Kings of the World. Obviously Dragon Slayer Magic would give a person an edge; they're Dragon Slayers, after all. It's a Magic designed to break through their, otherwise, impenetrable defense. And lol, Dragon Lacrima is extremely rare and expensive. Good luck.