There is a figure that stalks the dark corners of all of the worlds. A figure that will promise those that will follow it whatever they desire, to accomplish their fell goals. In exchange for their desires, it asks them to perform a variety of tasks to further the aims of the darklands or perhaps just the aims of the shadow figure.
The appearance will differ from sighting to sighting. This time she is a gaunt figure, female, almost emaciated in appearance. Covered in dirty linen wrappings, with a blood soiled bandage covering her eyes, she moves from cavern to cavern, forgotten temple to blasphemous fane, from sunken empires to endless sunless ocean. All along her path she recruits the outsiders to her cause, banding them in impromptu groups to accomplish her goals and then rewarding her charges before moving on in her travels.
This is one such group recruited to her cause, her agents there in the darklands reaching up into the sunlit worlds.