The 7 Wonders: Cities expansion introduces new City cards to all three Ages of 7 Wonders. These cards bring Embassies, Gambling Dens, Mercenaries, Torture Chambers, and more to your city. They also intensify interactions between players by introducing the mechanics of Diplomacy and Debt, which you can use to sow discord among your opponents or collaborate with them. New leaders may guide your city, from the insane Caligula to the glamorous Berenice. Finally, new Wonder boards featuring the famous Jordanian citadel Petra and the Imperial captial Byzantium join the game, allowing it to accomodate up to eight players.