Wikipedia
Z'bri are the spiritual demonic creatures living in the Tribe 8 role playing game setting from Dream Pod 9.
The Z'bri appeared just after the disaster struck the Earth. Though the nature of this disaster is never fully explained, the result was the appearance of the "Z'bri", twisted demonic creatures of spirit who either initiated the fall of the "World Before," or came in the wake of its destruction. The Z'bri, needing flesh to sate their demonic hungers, herded the majority of humanity into camps where they were killed or enslaved until the "Fatimas" ( avatars of what is called "The One Goddess") imbued humanity with hope and with Synthesis, a potent but subtle form of dream magic. In this way, the Z'bri were fought back into the wilds. The Fatimas then established the tribal lands of Vimary, protecting the inhabitants of their own tribes.