Thx p3lim.

Is SecureAura_GetUnit a Cata only function or did you mean SecureButton_GetUnit?

23.header:HookScript('OnEvent', OnEvent)

I understand, by default the header engine is already registered the aura, and got a OnEvent function script.

In the previous code you replace the function OnEvent of the secure aura header.

Here's my implementation if anyone's curious. I went with using the Animation-system for timers and fading, mostly just to try it. Once I realized you can only have one AnimationGroup per region it was easy. :P

http://pastebin.com/k7JvAdSg

Yep, typo

Yeah, I figured the header already register UNIT_AURA and had an OnEvent script, so I just removed my event registration and hooked the OnEvent script.