Since I'm making a hunting-themed changeling, I've been looking at both Glamour and Cloak of Shadows. I've decided to give her Glamour, since that feels so intrinsic to everything faerie, and Cloak of Shadows very much fits her concept of a sneaking, stalking hunter. However, there is a distinct overlap on the sneaking department between those two powers. With access to Minor Veils, is the stealth part of CoS actually worth anything?
I started thinking that maybe the veils from Glamour requires some non-trivial amount on concentration to keep up, however the rules don't mention it. I was thinking that if it requires concentration, it might count as a supplemental action.
So: Is the upkeep of a Glamour veil considered a Free or Supplemental action?