In the city of Corvis an accursed man alone walks the besieged streets seeking salvation between the pages of a forbidden book. Dwelling within his shadow is an implacable evil that plagues him and seeks to draw him ever deeper into a circle of mysteries that would turn him into a tool for corrupt and damnable unearthly powers. His only salvation lies within a ritual inscribed upon the pages of a proscribed codex of infernal lore. The Umbral Spiral is a tome of enigmas that delves into matters of infernalism, ancient occult wisdom, and arcana many would consider to be the very definition of evil. It is the only key to freedom for a man with little hope left. An Iron Kingdoms adventure for four 6th level characters by Rob Baxter. Originally published as a bridge adventure in the Witchfire Trilogy Collected Edition, this adventure is easly adapted to any Iron Kingdoms campaign. From the Product page.