Atrocites

The monstrous atrocites are potent agents of The Devourer. Each atrocite has a unique form roughly similar to that of a member of some sentient species. If the original form has eyes, the atrocite’s are instead empty voids. If it has hands, each holds a fanged mouth that speaks of destruction. A gray haze forms above atrocites, constantly crackling with red energy and serving as the source of their void bolts.
Although they are outsiders, atrocites dwell primarily on the Material Plane, searching through space for places ripe for the depredations of a Devourer cult or helping extant cults execute massive acts of destruction beyond their normal capacity. An atrocite remains with a cult only so long as its presence and guidance clearly increases the recruiting power or destructive capacity of the cult, leaving as soon as it can to further spread its message of infinite unmaking.
Cultists sometimes smuggle atrocites into highly populated systems to spread the Devourer’s dire gospel, but atrocites travel on their own just as often, either teleporting over vast distances through space or using planar travel.