Pox Furnace bits

Every plague-touched army needs somewhere its foulness gets cooked up, and that is the job these pieces do. A furnace of the grimdark sort: squat, riveted, crusted with corrosion, a cauldron belly brewing whatever keeps a rotting host upright, crooked stacks above it and the heavy ironmongery of a working forge gone thoroughly bad. These are accessory pieces rather than a fighting unit, and they earn their place by giving a diseased force somewhere to have come from. Set among a ruined manufactorum, an infected settlement or a fortified objective, a furnace immediately tells anyone leaning over the table what kind of ground they are fighting across. Converters will raid it too, since corroded furnace ironwork is useful anywhere a scratch-built war engine needs a heart.