i want to add an ability to the dark archon which you cast on an area, and all units affected will not respond to commands from the player for a certain amount of time.
i am pretty good with the editor and i know how to make area of effect spells that apply a buff, but i dont know how i would do this.
i would prefer to not have to use triggers, as i am not that good with them.
Look at your Behavior, and then go into:
Modification -> Behavior -> State Flags
You will see a bunch of flags you can apply. It sounds like either Stun (as described by Kabelkorven above) or Uncommandable (Unit can still act on its own, but cannot be issued orders by a human player) would fit the bill for you.