[Solved] Detecting corpse unloading in a trigger?

[Marifax]

So, I'm trying to create an ability that deals damage based on how many corpses have been consumed. I've used the "Get Corpse" ability and detecting when a corpse has been picked up was no problem, but since you could just drop it a pick it up again increasing charges I need to detect dropping aswell. Is it even possible?
Thanks

EDIT: Used the raise dead ability instead, works perfectly. Moderator may close.