Illithor (large)

Description: a three meters tall armor clad ilithid with only four tentacles. It is more bulky and squat compared with the regular mind flayers and wields a mind-blade great sword. The Ilithor is created by the Elder Brain to function as commanders of the ilithid armies.

Armor Class: 18, Hit Points: 168 (16d10+80) , Speed: 40 ft.

Saving Throws: Int +6, Wis +7, Cha +7 (advantage from psi carapace)

Skills: Insight +7, Perception +7, Deception +6
Damage Immunities: Psychic
Condition Immunities: Frightened, Charmed
Senses: darkvision 120 ft., passive perception 17
Languages: undercommon, telepathy 120 ft.
Challenge: 10
Special:
Magic Resistance. The ilithor has advance on saving throws against spells and other magical effects.
Innate spellcasting (psionics): The ilithor’s innate spellcasting ability is intelligence (spell save DC 15). At will: detect thoughts, levitate, 1/day dominate monster, prismatic spray
Actions:
Multi-attack. The ilithor can make two attacks with its great sword.

Mind blast. The ilithor emits psychic energy in a 60 ft. cone. Each creature in that area must make succeed in a DC 15 Int Save or take 4d8+3 pyschic damage, and be stunned for 1 minute.
Great sword.  Melee weapon attack, 10 ft. reach, +9, 2d8 slashing +2d6 psychic damage.
Tentacles. Melee weapon attack: +9, 5 ft. reach, 2d10+4 psychic damage + grappled (escape DC 17), Int save 15,or be stunned until grapple ends.
Extract brain. Attack+9 One incapacitated humanoid grappled by the ilithor. Hit, the target takes 10d10 piercing damage. If this damage reduces the target to 0 hit points, the ilithor kills the target by extracting and devouring its brain.
Equipment/Treasure: psi carapace, mind blade greatsword