From publisher blurb: The great Lich Draxxus has unveiled his most incredible invention yet! A dimension with countless raised skeletons, each instructed to conduct simple arithmatic, based on the skeletons around him. With millions of these creatures all working at once, Draxxus has been able to make developments in magical studies that would have taken centuries! His Bone Zone is the talk of the world! There's just one, minor problem. It's broken. Journey into the Infernal Bone Machine, root out the infection rendering it inoperable and escape with your lives, if you dare! The Infernal Bone Machine is an adventure designed for Dungeon World.