detecting the deactivation of abilities

Is there anyway to detect when a unit deactivates an ability such as immolation or divine shield? the stops casting and finishes casting events happen without deactivating the spell, so i'm at a loss on how to do this.

In that case I usually just use 'is issued an order' type events. Then you can just look at the ability for the deactivate/turn off, and use that as the condition.

That doesn't work when the ability is deadtivated automatically.

Just keep looking until the unit no longer has the Immolation (caster) buff (or equivalents)

Hmm good point, I hadnt thought of when the mana runs out. so if i detect for the caster having the immolation buff equal to true or false then it should work yes? I'll try it out.