Mindwitness

Mindwitness
If the beholder can be stunned and brought safely to the brine pool of the elder brain, it can be converted through ceremorphosis into a mindwitness. The process of ceremorphosis transforms four of the beholder's eyestalks into tentacles similar to those of a mind flayer, and alters some of the beholder's eye rays.
Less intelligent than beholders and less liable to endanger the colony, mindwitnesses are psionically imprinted with devotion to the elder brain and submission to illithid commands, making them almost as obedient as intellect devourers.
Telepathic Hub
The primary function of a mindwitness is to improve telepathic communication in a mind flayer colony. A creature in telepathic communication with a mindwitness can converse telepathically through it to as many as seven other creatures the mindwitness can see, allowing the rapid spread of commands and other information.
Solitary Seekers
If separated from its illithid masters, a mindwitness seeks out other telepathic creatures to tell it what to do. Mindwitnesses have been known to ally with flumphs and telepathic planar beings such as demons, shifting their worldview and changing their alignment to match that of their new masters.