Hey guys. I revised Frodo, took some LUA from Demonic Metamorphosis and made a little addon. Basically, it plays a snippet of https://www.youtube.com/watch?v=o_8V5Fsr3hE when Crusade is cast.
As I said, all praise goes to code of Frodo and Demonic Metamorphosis as I don't know how to code LUA. Enjoy!
http://www.filedropper.com/crusader_1