I was thinking that for rogish characters, or maybe just anyone who wants to make a quick escape, that smoke bombs could be made. I'm sure that everyone has seen a movie or TV show where the villian tosses a smokebomb to the floor and flees under the cover, and I think it would be knida fun to be the one who makes the escape.
I don't know what would be required to make them, but they way i figure it is that it could just cast a low level version of Drakness on an area while the character flees, or does whatever they need to do undercover.
Anyway, that's my idea.