The War of Aconi
These are the Soulless. Humanoids who were failed experiments created by Morchus the Undying in his attempts to create the perfect slave. These Soulless inhabit the catacombs below Kingstown, and are only focused on finding and eating the souls of those still with them, and will stop at nothing to get them.
They are pale husks of the former humanoid within, and are basically unaffected by wounds, slashing out with magical deformities of claws that have extended their fingers into deadly sharp weapons capable of splitting solid stone.