Beholder

A Beholder is a large abberation normally found in the Underdark. These large, orb-like beings have ten eye-stalks and one central eye, each containing powerful magic. Vicious creatures, Beholders are quick to attack enemies, which include anyone it deems not "like themselves."

Beholder Magic
The Beholder's magic originates from each of their eye-stalks and its central eye. Each of their eye-stalks can cast one of ten spells on a single target as if casted by a thirteenth level caster.. The spells they can cast are Charm Monster, Charm Person, Disintigrate, Fear, Finger of Death, Flesh to Stone, Inflict Moderate Wounds, Sleep, Slow, and Telekinesis. Each of these spells have DC 17 saves. The central eye of the Beholder also has a powerful Antimagic Cone. It constantly emits a 150 foot cone that effects all within it, including the Beholder, as if by the spell Antimagic Field. The Beholder choses to turn this field on or off once each round by opening or closing their central eye.

Sane Beholders
Beholder minds are divided into two separate entities. Each of these entities thinks and acts on its own accord even though it is bound to the same body as the other half of its mind. Niether half of the Beholder's mind trusts the other, so they hide a lot from each other, creating a very paranoid relationship.

"Sane Beholders" are Beholders whose minds are not "divided" so to speak. There are still two entities within the Beholder, but niether hides anything from the other, making a less paranoid Beholder. However, the persona of a "Sane Beholder" is just as likely to be considered "insane" by any one else as the persona of any other Beholder.