It would be nice if the chakra cost on this was reigned in a bit. It takes a lot of chakra to start as well as to maintain and it really doesn't last all that long (especially since it's only sorta noticeable at max level (of mist in the room), anything less is...not really noticeable at all).
Also, I have it adepted. It costs 130 for me to start, and 50 per refresh from then on. However, I think there's a check wrong somewhere as I get stopped and receive the message "You need at least 150 Chakra to keep doing this! " if I have less than 150 (even though it's only taking 50 each time).