"The Master Builder 's prize invention smashes enemy buildings to bits. What better way is there to show who's the best builder around? Unlock the Electric Hammer ability to give opponents a real pounding!"
Tapping this icon displays information about the Battle Machine, such as Damage per Second, Hitpoints and Ability Level.
Tapping this icon begins upgrading the Battle Machine to the next level, if you have enough resources and a freeMaster BuilderorO.T.T.O. When the Battle Machine is at maximum level, this icon is not shown.
Tapping this icon instantly upgrades the Battle Machine to the next level, at the cost of oneHammer of Heroesif you have one. When the Battle Machine is at maximum level, 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 ofGems.
Tapping this icon, which is displayed only while the Battle Machine is beingrebuilt, instantly finishes that upgrade at the cost of oneBook of Building. This icon is only shown if you have at least one Book of Building.
Tapping this icon, which is displayed only while the Battle Machine is beingupgraded, instantly finishes that upgrade at the cost of oneBook of Heroes. This icon is only shown if you have at least one Book of Heroes.
Tapping this icon, which is displayed only while an upgrade is in progress, instantly finishes that upgrade at the cost of oneBook of Everything. This icon is only shown if you have at least one Book of Everything but do not have a Book of Building or Book of Heroes, where relevant.
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 temporarily boosts all yourHeroesandPetsto the maximum level allowed by yourTown HallandBuilder Hallfor 1 hour, at the cost of oneHero Potion. This icon is only shown if you have at least one Hero Potion.
Tapping this icon resumes a paused Hero Potion boost. This icon is only shown if you have an active Hero Potion boost that was paused by a maintenance break.