A Marsi succubus, Selisa, disappears from the streets.

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En route to a meeting with her most recent beau, Selisa is approached by a nearly opaque patch of shadow. From within the cloud, two glowing eyes appear, and a small hand made of shadow reaches out of the dark.
  "You're pretty," a voice whispers, "Come play with me?"
  The shadow swallows her. She is never seen again.