The Colossus of Ironsavages stands 16 z-levels in height on a platform suspended above the local volcano, a statue of a dwarf with an axe in one hand, holding aloft a mug of dwarven ale in the other. Constructed from obsidian blocks aside from the axe, mug and the dwarf's beard, which are gold bars. The statue is partially hollow, such that captured orcs and goblins can be dragged up narrow stairs inside and thrown into a chamber behind the mouth, with fortifications forming the statue's teeth.
An especially noteworthy feature is the clever magma-ductwork which allows molten rock to be pumped up through the statue to pour in a fiery cascade from the mouth; any captives trapped within the statue at such times are immersed in magma, and their immolation wreathes the statue's head in clouds of smoke.