ELDER BRAIN
At will - adapt body, astral projection, awe*, banishment, body equilibrium, catapsi, clairaudience/clairvoyance, control body, control light, create sound, detect thoughts, dimensional anchor, domination, energy barrier, fabricate, false sensory input, know location, levitate, mass domination, matter rearrangement, metamorphosis, mind probe, mindwipe, probability travel, psychic chirurgery, psychic vampire, sense link, suggestion, suspend life, telekinesis, teleport, ubiquitous vision, and ultrablast. These abilities are as the powes manifested by a 20-th level psion. *This psionic power is unique to illithids, and appears in The Illithiad.
Attack/Defense Modes (Sp): At will - ego whip, id insinuation, mind blast/all.
These powers are also listed for the elder brain, and I'm not sure what their 3rd edition equivalents are, if any:
ballistic attack
complete healing
teleport other, time shift
ejection, mind blast, id insinuation, mind thrust, psychic crush
empower, cannibalize, magnify, prolong
UROPHION
At will - awe*, body equilibrium, control body, detect thoughts, domination, levitate, sense link, and suggestion. These abilities are as the powes manifested by a 9-th level psion. *This psionic power is unique to illithids, and appears in The Illithiad.
Attack/Defense Modes (Sp): At will - ego whip, id insinuation, mind blast/all.
ULITHARID
At will - astral projection, awe*, body equilibrium, control body, detect thoughts, domination, intrusive sense link, levitate, probability travel, suggestion, and teleport. These abilities are as the powes manifested by a 10-th level psion. *This psionic power is unique to illithids, and appears in The Illithiad.
Attack/Defense Modes (Sp): At will - ego whip, id insinuation, mind blast/all.
The following creatures were converted from 1st edition sources. I know that the attack and defense modes correspond to 2nd/3rd edition modes, but I don't remember where to look to find this correlation.
CESSIRID
At will - body equilibrium, detect thoughts, and dimension door. These abilities are as the powes manifested by a 6-th level psion.
Attack/Defense Modes (Sp): At will - B,E/F,G
EMBRAC
At will - detect thoughts, empathy, invisibility, and mind blank. These abilities are as the powes manifested by a 5-th level psion.
Attack/Defense Modes (Sp): At will - A/F
KIGRID
At will - body equilibrium, detect thoughts, invisibility, and levitate. These abilities are as the powes manifested by a ?-th level psion.
Attack/Defense Modes (Sp): At will - A,E/F,G,H
SALTOR
At will - body equilibrium, detect thoughts, and levitate. These abilities are as the powes manifested by a 5-th level psion. Saltors of exceptional intelligence will also have 1-3 of the following powers: astral projection, dimension door, dimension walk*, domination, hypnosis*, and mind blank.
Attack/Defense Modes (Sp): At will - A/F,G
* (These powers are 1st edition powers.)