MMMM-MONSTER KILL!! help :(

You know those quake sounds often used on counter-strike and stuff?

The ones that say:
MONSTER KILL!
UNSTOPPABLE!
DOMINATING!
and other quake sounds.

Does anyone know of an addon in wow that after you get a killing blow or critical that happens?
I know its cheesy but i like them :O makes me play better for some reason. also fun when grinding :D

All i need is an addon that does that. thanks in advance.