Volretz (5E)

From publisher blurb: Can You Stand the Heat? On the forge-world of Volretz, searing hail and metal beasts seethe in oceans of molten slag while heat-shielded engineers man the endless foundries of Morkansia. New feats, spells, and gear to help you survive this inferno of riches await, along with a detailed planetary gazetteer, adventure hooks, and a brand-new monster, the heavy metal elemental!