When you have total concealment, you automatically become hidden from all enemies whose Spot defense is lower than 10 + your Stealth check modifier. If you attack a creature, it may still make a Perception check to find you.
At each even level, you choose a new at-will Trick. You may choose maneuvers from this class feature or any of your other class features.
At each odd level, you choose a new class feature. Some class features allow you to choose one or more ranked Trick; you may choose ranked Tricks from this class feature or any of your other class features.