Beholder

The beholder (eye tyrant, sphere of many eyes) is most frequently found underground, although it infrequently will lair in desolate wildernesses. The globular body of this monster is supported by levitation, and it floats slowly about as it wills. Atop the sphere are 10 eyestalks, while in its central area are a great eleventh eye and a large mouth filled with pointed teeth. The body is protected by a hard chitinous covering. The creature’s eyestalks and eyes are also protected, although less well. Because of its particular nature the beholder is able to withstand the loss of its eyestalks, these members are not computed as part of its hit point damage potential, and lost eyestalks will eventually grow back (1 week per lost member). 
These arrogant and chaotic beasts are often found at the top of organizations spreading crime and/or chaos.  They have a tendency to enjoy discussing their own greatness.