Since there's an underwater region (Jal) now, I got the idea for a buff that makes your hair and clothes look all soggy, in addition to giving you a little mood and energy. Possibly could make you leave watery footprints behind you for a few minutes. This buff would be triggered by exiting Jal for another region (or your home street/house/tower) after being in Jal for a certain amount of time.
It would be called "You're all wet!" or something better.