An ancient cult, seeking irresistible power, surfaces on nights of the Blood Moon to perform profane, esoteric rites—merging their flesh with demonic spirits, and becoming one with an ever greater darkness.

Ancient manuscripts tracking the orbit of the Blood Moon describe it not as celestial phenomenon, but as a cosmic womb. As the seasons grow shorter and the cult's activity continues to increase, some worry it will give birth to a new kind of demon—a creature helping to bring about its own dark ascendance.