[Under the cloak, Julian and Tiara move through the halls to the bathroom, where they pull the grate off the wall and enter the vents.] Julian: You were right earlier, Tiara-- the cancelling fields are built into the walls and can't just be cast anywhere. And they can't be left on for too long, either, or Wychwood won't be able to use any of their own spells. If we stick to areas where they can't be installed, we should be able to avoid traps.