Illithids use Psionic Blast to stun opponents. There is no save to this; the only way you can avoid it is by using the cleric spell Chaotic Commands. Once you are stunned into a fugue state they will use an attack called Psychic Drain which ALWAYS hits (no to hit roll required once they are in melee range). This will get through protections like stoneskins. Each hit will drain you of 4 pts of Intelligence. Once you hit zero, you're dead. The only way to delay this is to kill them first, or to use potions which temporarily increase your intelligence.
------------------
