Ceustodaemons are formed from the souls of vile mortals, particularly those who took efforts to hasten their own death, their willingness shaping them into daemonic servants. Their otherworldly senses make them useful for protecting vaults and similar locations on the Material Plane. Ceustodaemons are created to serve, but always seek ways to subvert their bindings, so they can rend their mortal summoners' flesh. The worst type of conjurer calls upon ceustodaemons merely to set them free into the world in hopes of currying favor with the powers of Abaddon.