+2 Int, +1 Wis, +1 Cha

Advantage on magic saving throws

Can cast Detect thoughts (at Level 3) and Levitate (at Level 5) at will, and can cast Plane shift (self only) (at Level 7) and Dominate monster (at Level 9) once per day

Melee. Unarmed. Int modifier + proficiency bonus (if proficient in saving throws) to hit. 1d6 + Int modifier psychic damage. If medium or smaller, grappled (DC 15), and DC = 8 + your proficiency bonus + your intelligence modifier vs Int saving throw or be stunned

Melee. +7 to hit. Against grappled incapacitated humanoid. 1d10 psychic damage. If kills Mind Flayer extracts and devours brain. +1d10 at level 3, 5, 7, 9, 11, 13, 15, 17, and 19

Level 2 ability, 12-foot cone, DC = 8 + your proficiency bonus + your intelligence modifier vs Int saving throw, 1d8 + Int modifier psychic damage and stunned for 1 minute. They can reroll against stun on their turn. +12 feet at level 4, 6, 8, 10. +1d8 at level 5, 7, 10

You have superior vision in dark and dim conditions. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.