You, the Knight have to explore the castle, and collect the 10 Magical Shields which will unlock the Castle Exit so that you can reach the Sword of Power. On completion, the Castle is re-stocked with shields, and the Knight navigates the Rooms to gain more points and the chance to reach the Sword again.

Knights: 3
Shields Per Sword: 10
Rooms: 32 (with upper & lower floors)