For the action "All Cthonians and Dholes in Arkham are returned to the cup," does this include the outskirts and sky spaces?
Edit: since these creatures cannot fly, this question is more about whether such monsters in the outskirts would be returned, i.e. whether they are considered "in Arkham". Short of finding some rules reference, I would think the fact that gate closing affects monsters from the outskirts would make it likely removing creates "in Arkham" implies the outskirts as well.