In the Shadowfell, a river of lava infused with shadow magic had long been used to evil purposes. Several hundred years ago, a clan of mages built a tower next to the flow, to study and draw on the power within the lava. Sarshan took possession of the tower recently, and built the Umbraforge to syphon off the lava’s power. The fire and necrotic energy was used to create powerful weapons, and terrible abominations.
After irreparable damage was recently done to the forge, the overwhelming heat and necrotic power of the dark lava caused massive earthquake. Magma spewed all over the nearby camp, the tower was destroyed, and the entire mercenary operation was consumed in dark fire.