You're searching the castle for a mysterious room you have heard of called The Room of Requirement. You have searched every nick and cranny of the castle but still no room. You climb the stairs to the seventh floor and come across a stange tapestry showing Barnabas the Barmy trying to teach trolls to dance the ballet. You laugh at the silly tapestry until you side almost burst. Then you remember hearing the Room is located opposite such a tapestry. You turn around expecting to see a door, but find a blank wall instead. You start walking back and forth three times concentrating hard on what it is you need. Suddenly a door appears. You open it and discover you have found the Room of Requirement...