Boss reset

[Darthdirtbag]

Hello. I'm trying to get a trigger to work where whenever all of the units in a region that are not the Neutral Hostile's units die, then The Boss Hostile unit Moves back to his region and all of his minions despawn yadda yadda. But, no matter what I try, I can't get it to work. Can anyone point me in the right direction?

 

[Dr Super Good]

Keep track on the number of hostile units in the region. Whenever 1 dies, relove them from a group. Whenever 1 enters the region, add them to a group. If the group is empty, then all are dead so the boss can be reset.

 

[Adiktuz]

and post the trigger that you used...