|City Hall – Seaport – Alchemy Lab – Blacksmith – Challenge Hall – Arena – Ascension Tower – City Defense|
Auction House – Stable – Guild Hall – Ranking Board
City defense is a great source of Silver. You are offered both defensive units to add as well as pick a deck that will be played alongside them. The higher the level and HP of your castle the more silver you get per day, and you also score silver by attacking players successfully. You can attack other cities up to 5 times a day and can purchase additional attacks for gold.
Note: At high levels of City Defense (+10) the castles become nearly impossible to defeat. The higher your Defense level, the higher opponents you will meet. Do not rush upgrading this! Also note that every time you upgrade a castle, you can attack 5 times again.