From PathfinderWiki
Type Outsider
(evil, extraplanar, kyton, lawful)
CR 5
Environment Any (Plane of Shadow)

Source: Beyond the Doomsday Door, pg(s). 86

Ostiariuses are a race of velstracs from the Plane of Shadow who act as gatekeepers between the Material Plane and the Shadow Plane; and act as emissaries for the velstracs in general.[1]

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