Missing full functionality unless Blizzard restores the ability to read buffs while in instanced combat.
How to Use: You can type "/pbl test" and it will start playing and continue to play until you type "/pbl stop". You can click and drag to move it around and while hovering over the icon you can use the scroll wheel to resize it.
The animation and music will play automatically when any version of bloodlust is cast, but does not work in instanced combat.
You can trigger the animation and music manually with the command /pbl number, and replace number with the number of seconds the animation should run.
For example if you want it to run with Ascendance which is 15 seconds.
So you would make a macro that is :
#showtooltip
/cast Ascendance
/pbl 15