first of all, get a damage detection system, i am sure you will find one if you search in this forum.
then use a trigger like this:
Code:
Untitled Trigger 001
Events
A unit takes damage (you need damage detection system for this event)
Conditions
(Level of Bash for (Damage source)) Equal to 1
Actions
...
One thing bad about damage detection system is that it can't differentiate spell and physical damage. The ability need to based off some Orb Effect ability which will give buff on attack (which is a con). Imagine if the unit has Immolation... Lots of instant kills .
Use Bash with max damage should be the easiest way .
E: unit is attacked
C:level of (ability) for attacking unit equal or greater than 1
random integer number between 1 and 100 less than or equal to (some number)
A: kill attacked unit
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.