I figured as much, but didn't know what to do. as it's an aura and is always active don't know what condition to put. As well as I want a drain effect like death and decay. to drain say 1% of their health, but the trigger i made to try to use didn't work at all..
Events - Unit - Arthas (Evil) 0000 <gen> Starts the effect of an ability
Conditions - (Ability being cast) Equal to Death Aura
(Race of (Targeted unit)) Not equal to Undead
Action - Unit - Remove Unholy Aura buff from (Targeted unit)
Unit - Cause (Triggering unit) to damage circular area after 1.00 seconds of radius 900.00 at (Center of (Playable map area)), dealing 5.00 damage of attack type Spells and damage type Normal
tried to test it on an enemy arthas, and didn't do anything. OH well. Other than that. I haven't tried anything else yet. Is there a trigger to cause a % of damage instead of a set amount?