User blog comment:Perchan/Fairy Tail 295 - In Which Sting Gets Less Douchey (Sting and Lector)/@comment-3061966-20120817171126/@comment-3061966-20120818025724

Knightwalker, Holiness as a word is just something Sting uses to hype up his light based DS magic. It's just Light Magic. If anything, it goes to show how pretentious he is.

@Persona: True, but at the same time, Ivan is Makarov's son. You'd think the guy would be exceptional. I mean, people used to theorize on whether he could match up to Makarov. But that's all down the drain. You hate Minerva too? D:

@ Zara: Phantom was even worse in that Erza was the one who hyped them up. Nonsense that their full forces could match Fairy Tail's. Now we know that's FAR from the case. Since then I've never really given much weight to Erza's words on the topic of strength, which is again affirmed by how weak Baachus turned out to be -- she doesn't know what she's talking about sometimes lol.

About the respective element transformation, that's because, I'd guess, that is an ability deriving from the mastery of an elemental magic not its' Dragonslayer counterpart. Laxus can turn into lightning since he mastered Lightning magic and he happens to be a Dragonslayer as well. Also, Gajeel technically transforms his parts of his body into iron for some of his spells, so there's two exceptions.