This co-operative game based on a section of the third Harry Potter novel the Prisoner of Azkaban pits a team of players against an electronic hour glass in a race to the top of Hogwarts' tower.Each turn players roll dice to move Harry and/or Hermione as they gather tiles on their way to Hagrid's Hut to pick up the hippogriff, Buckbeak. However 3 Dementors patrol Hogwart's grounds and tower. Players must avoid their soul sucking kiss or they will be frozen for a turn. Meanwhile the battery operated sandtimer ticks silently away, changing color from blue to red to flashing red as the 15 minutes of allowed time elapse. Extra time can be added to the clock by use of Hermione's Time Turner spell, and Dementors can be repelled by Harry's Patronus spell. Once on Buckbeak the two young wizards fly up the spiral path on the three dimensional tower in their attempt to rescue Harry's godfather Sirrius Black before time runs out. - BoardGameGeek