Actually, why not? Water powers can be whatever you want them to be since nobody's actually told you what they are! You're deciding right now that Water powers are you can make little guys and they can go find the bad shades and get rid of them. You stick the find() and delete() commands in a little guy you call Sewolf the Third (after its two noble idols) and send it hunting for "shades that don't belong in the game." Zevvie will get a kick out of this, you think.