[@Kaithas] Sorry, I didn't know that was a touchy subject.

[@tobiax] If you can't think of a useful mask, try going with a power that relates back to the character in some way. Maybe it references some aspect of their personality, or works well in combination with their element or skills. Don't worry so much about utility. Eventually, a situation is bound to come up when any particular mask will be useful, even if it is one with a narrower range of applications.