|LEGO → System → Castle → Ninja|
This set has two grey Ninjas, a black Ninja, a robber, four samurai, and a skeleton. The Flying Ninja Fortress has many alternate designs, as well as an abundance of traps and treasures. Some of the traps include a revolving door that reveals a skeleton and four halberds at the door. There are three treasures throughout, two gems on one side of the revolving door, a magic scroll inside the castle, and a katana on a gold pedestal in the basement.