New York 1901: Flatiron is a mini-expansion for New York 1901 that consists of: 1 Legendary Skyscraper, namely the Flatiron Building 1 Strong Arm action card for each player 5 Bonus Challenge cards: Cluster, Dynasty, Silver Titan, Big Developer, Real Estate Mogul The Strong Arm action allows a player one time per game to move a card from the open market to the bottom of the deck, then replace it with a new card. New York 1901: Flatiron (Spielbox #5, 2015 version) is a mini-expansion for New York 1901 that consists of: 1 Legendary Skyscraper, namely the Flatiron Building 3 Bonus Challenge cards: Big Developer, Real Estate Mogul, Silver Titan