Blacksmith

Tapping this icon begins upgrading the Blacksmith to the next level, if you have enough resources and a free Builder (or B.O.B). When the Blacksmith is at maximum level, this icon is not shown.Tapping this icon instantly upgrades the Blacksmith to the next level, at the cost of one Hammer of Building if you have one. When the Blacksmith 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 in progress, instantly finishes that upgrade at the cost of one Book of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building.Tapping this icon, which is displayed only while an upgrade is in progress, boosts all your Builders for 1 hour by a factor of ten, at the cost of one Builder Potion. This icon is only shown if you have at least one Builder Potion.Tapping this icon, which is displayed only while an upgrade is in progress, cancels the current upgrade and refunds half of the upgrade cost.Tapping this icon brings up the Hero Equipment interface where you can select and upgrade equipment.