Tapping this icon displays information about the Clan Castle, such as Level, Troop Capacity, Hitpoints and Troops inside.Tapping this icon begins upgrading the Clan Castle to the next level, if you have enough resources and a free Builder (or B.O.B). When the Clan Castle is at maximum level, this icon is not shown.Tapping this icon instantly upgrades the Clan Castle to the next level, at the cost of one Hammer of Building if you have one. When the Clan Castle is at maximum level, or if the Town Hall requirements for the next level are not met, this icon is not shown.Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of the displayed number of Gems.Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of one Book of Building. This icon is only shown if you have at least one Book of Building.Tapping this icon, which is displayed only while an upgrade is i...
