That gives a warning when the target is at or below 25%. Any1 know an addon like that, or has that included? I'd like to pump up my Drain Soul executes ;D
With Parrot(ckknight's SCT) you can make a trigger/event to say "DRAIN SOUL NOW!" when your target gets to 25% HP.
Under triggers/events make a new one, name it, etc., etc just be sure to choose the target % HP condition and set it at 25%.