A beholder, also known as an eye tyrant or a sphere of many eyes, is a large orb dominated by a central eye and toothy maw. In wildspace, they gather into larger communities than their groundling cousins. Wildspace beholders also have more variety than groundling beholders, and occasionally have eyestalks that function differently. (For example, an eyestalk that functions like a detect lie spell instead of a finger of death spell.)
See the Beholder entry in the Monster Manual for a full description of common beholders and their abilities; and the Beholderkin entry in Lords of Madness: The Book of Aberrations for a description of the Hive Mother.
The bulbous creature floats before you, it's one enormous eye a milky white. A handful of thin, atrophied stalks crowns its chalk-white body.
The orbus is only found among spacefaring beholders. They are the means by which beholders move their ships through the void, channeling the energies of other beholders into motive force. Aboard a ship, they tend to be found near the hive mother, at the ship's deepest bowels.
Orbi are barely aware of their surroundings. Their only defense is flying away from anything that deals them direct damage.
Antimagic Cone (Su): An orbus' central eye continually produces a 150-foot cone of antimagic. This functions just like antimagic field (cast level 11th). All magical and supernatural powers and effects within the cone are suppressed. Once each round, during its turn, the orbus decides whether the antimagic cone is active or not (the orbus deactivates the cone by shutting its central eye).
Propel Ship (Su): Orbi have the innate ability to propel a ship through wildspace without the use of a spelljamming helm.