Stasis Trap

I'm wondering what the best way is to detect when a stasis trap goes off. You can do some great things with them i.e. mass debuff, blizzard, inferno. Just curious what the event would be the instant it becomes active and stuns.

Im not sure if this will work. But try it anyway:

Kill Counter
Events
Unit - A unit Dies
Conditions
(Unit-type of (Dying unit)) Equal to Stasis Trap
Actions
do whatever you want