The Tower of Bozbar is an ancient game of unknown origin similar to the Tower of Hanoi.
It consists of three pegs and a pile of weights. The goal is to move the pile from one peg to another, moving one weight at a time, with the constraint that no weight can ever be placed atop a smaller weight. Many people say that the Tower of Bozbar is a superb method of mental relaxation.
Barbazzo Fernap's room had a closet with a ToB. According to which peg the weights are placed, a new section (west, north or east) opens.