I got the following from the old forums.
I made one for Demonic Empowerment (#34 in my export list): Here is the code you can copy for the latest version:
Version:4.9; b:0.698; anim1:4; g:0.4824; icon:Spell_Nature_RemoveCurse; buffname:Demonic Rebirth; x:4; isAlive:0; texture:9; duration:2; sound:25; wowtex:true; combat:true; size:1.09; y:-24; texmode:2; finish:0; timer.enabled:true; timer.y:-72; timer.x:-2; timer.ShowActivation:true
It will play a soundfile (you can change, its set to wilhelm or something like that) which screams and displays a circle around you and a timer before you rebirth runs out.
Simply open Power Auras /powa Click on Import, and copy the whole text from here and paste it in the box that opens. Your icons will be created and you can adjust the settings to your liking.
I will be posting 33 sets in a few hours once i am able to copy/paste them to fit in each post.
Hopefully We can Sticky This. I think if you click on LIKE, the more I get, the easier it might be for it to qualify. But feel free to add your own.