From the introduction: I know what you are, traveller who has come from beyond the Warp. I can smell it on you mystical power, alien exposure, ill-gotten abilities. You have stood in the presence of creatures man ought not to comprehend. But I can see in your soul, and that beneath the corruption and heresy lies the original divine ember of humanity. Perhaps you might use it to set alight the Grim Dark and banish it forever.