This is currently written for Warlords of Draenor beta only, seeing as how this spell doesn't even exist yet, on live.
**If this doesn't work for you when the beta servers pop back up, please let me know!! When I am able to test, I will. **
This Addon plays High Priest Thekal's "Shirvallah! Fill me with your RAGE!" from the old ZG when you shift into the new Claws of Shirvallah Talent-ed cat form.
It is set to play with Master sound, so it will still fire and be heard, even if you keep your "Sounds" turned off in game, as I do. As long as your "Master Sound" is set high enough, it will still be loud enough to hear.