[quote=@Demous]
so i have a quick question: How would you differentiate shadow dragon slayer magic from shadow god slayer magic?
[/quote]

I thought one has a dragon in the name and the other is a god. There's more than just the name? lol xD

[quote=@Joshua Tamashii]
Shear power. Look at the Zancrow vs Natsu fight
[/quote]

That's what I thought at first, but then I saw the sky and lighting slayers fight during the games which made a wonder a bit more. Would it be because it's considered as a lost magic that sets them apart? But it's probably just the strength.