Medium aberration, lawful evil

Armor Class 15 (breastplate)

Hit Points 71 (13d8+13)

Speed 30 ft.

11 (0) 12 (+1) 12 (+1) 19 (+4) 17 (+3) 17 (+3)

Saving Throws Int +7, Wis +6, Cha +6

Skills Arcana +7, Deception +6, Insight +6, Perception +6, Persuasion +6, Stealth +4

Senses darkvision 120 ft.

Languages Deep Speech, Undercommon, telepathy 120 ft.

Challenge 8 (3,900 XP)

Magic Resistance. The mind flayer has advantage on saving throws against spells and other magical effects.

Innate Spellcasting (Psionics). The mind flayer is a 10th-level spellcaster. Its innate spellcasting ability is Intelligence (spell save DC 15; +7 to hit with spell attacks). It can innately cast the following spells, requiring no components:

At will: guidance, mage hand, vicious mockery, true strike

1st-level (4 slots): charm person, command, comprehend languages, sanctuary

2nd level (3 slots): crown of madness, phantasmal force, see invisibility

3rd level (3 slots): clairvoyance, fear, meld into stone

4th level (3 slots): confusion, stone shape

5th level (2 slots): scrying, telekinesis


Tentacles. Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 15 (2dl0+4) psychic damage. If the target is Medium or smaller, it is grappled (escape DC 15) and must succeed on a DC 15 Intelligence saving throw or be stunned until this grapple ends.

Extract Brain. Melee Weapon Attack: +7 to hit, reach 5 ft., one incapacitated humanoid grappled by the mind flayer. Hit: The target takes 55 (10d10) piercing damage. If this damage reduces the target to 0 hit points, the mind flayer kills the target by extracting and devouring its brain.

Mind Blast (Recharge 5-6). The mind flayer magically emits psychic energy in a 60-foot cone. Each creature in that area must succeed on a DC 15 Intelligence saving throw or take 22 (4d8+4) psychic damage and be stunned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.