Mind flayer

The Mind Flayer, also called the Ithilid, is an evil and sadistic being, humanoid in appearance, but with a four-tentacled octopus-like head. These fearsome beings are feared throughout the Underdark for their telepathic abilities and usually are not without two or more slaves, mentally bound, to each individual Mind Flayer. Although they are cooperative in working together to achieve a goal, they will back away at the first sign that it is not something that will be self-profitable. They are capable of speaking Undercommon, but prefer telepathic communication and will attempt to mentally dominate any non-slave, non-ithilid they meet.

Ithilid Psionics
The Ithilids are feared by all beings in the Underdark because of their great mental prowess. Every Ithilid has a small array of mind-effecting spells to take control of their prey as well as a powerful Mind Blast to effect a multitude of foes. The Mind Flayer's Mind Blast is a sixty foot cone that stuns anyone caught within it unless they succeed a DC17 Will save. The Mind Flayer also can innately cast three mind-effecting spells: Charm Monster, Detect Thoughts, and Suggestion, with DC17, DC15 and DC16 respectively. Mind Flayers are also capable of casting Levitate and Plane Shift. Each of these spells are cast as if by an eighth level caster, and the saving throw DCs are based off the Ithilids charisma score.

Normally, an Ithilid will use its Mind Blast ability to stun a few foes and then drag them away to feed. Once it has its victims, it must perform a successful grapple check and attach all of its tentacles to the head of its victim. Then, the Ithilid uses its Extract ability to suck out the brains of its victims, instantly killing the victim, as long as it only has one head. The Ithilid uses its other spells mainly to enslave its minions and keep them under total control, as well as in the battle field.

Mind Flayer Sorcerers
Although most Ithilid casters are Wizards, few are also born with gift of Sorcery. Because an Mind Flayer Sorcerer naturally has higher charisma scores than other Mind Flayers, all of its saves for its psionic abilities are 4 points higher. For the most part, an Ithilid with the gift of Sorcery will use defensive spells such as Greater Invisiblity and Resist Energy as well as spells to further hinder enemies, such as Ray of Exhaustion and Touch of Idiocy.

A typical spell book for a ninth level Mind Flayer Sorcerer is as follows: Cantrips: Arcane Mark, Daze, Detect Magic, Disrupt Undead, Flare, Ghost Sound, Light, Read Magic - Six Spells Per Day First Level Spells: Chill Touch, Mage Armor, Magic Missle, Ray of Enfeeblement, Shocking Grasp - Eight Spells Per Day Second Level Spells: Minor Image, Resist Energy, See Invisibility, Touch of Idiocy - Eight Spells Per Day Third Level Spells: Fly, Haste, Ray of Exhaustion - Eight Spells Per Day Fourth Level Spells: Greater Invisibility, Stoneskin - Five Spells Per Day