Picking a single unit in region

How do I select a random unit in a region, and do an action on it and only it? I may have missed it, but I could not find a trigger to do it. Thanks.
-Trepidity

Well which unit do you want to select? A random one?

Yes just a random unit...that is not a Circle of Power actually

Yo Trepidity, I just replied your post in the other thread. Do check it out, it should have the answer for your problem.

To do what you are asking, you still need to use the "Pick every unit in <etc>" action, just change the <etc> to Random N units in (region).

Unit Group - Pick every unit in (Random 1 units from (Units in (Playable map area))) and do (Do nothing) <-example