Originally not a pony song, but I found that it reminded me a lot of Discord.

Please don't hate me Blind xD -Pinkydash

I WILL NEVER FORGIVE YOU FOR THIS.
Song named after Belgerum, whose music inspired this song despite the fact that I've listened to maybe three waltzes in my life. -Blind

Original Song Composed by Blind of PINKI3KREW

Soundcloud/Download: http://soundcloud.com/magnitudezero/the-waltz-of-wizardry