This is an addon which I modified to play a sound and show an icon whenever the Warlock talent Backlash procs.
Its my first working mod, all my others I never fully finished.
When the ability procs, a picture pops up and a sound plays. Now fades properly upon dying, allowing you to focus on rezzing and killing in BG.
The icon is fully movable, it shows using /blshow and hides using /blhide
Simple.