I believe it's the main theme of fairy tail?
I stopped playing this mod a while ago due to a lack of time, but I started watching fairy tail after reading the manga (why I'm up 3 after midnight tonight).
I heard music I recalled from this mod while I was watching and I'm freaking out because I loved this mods soundtrack and that was the best song
I even made a forum account to tell you
Sorry if I'm rambling or incoherent, it's technology induced sleep loss disorder kicking in
Edit: the real coincidence is how I just started watching the anime three hours ago, just in time to hopefully help you out