Eu encontrei uma corrida Mind Flayer homebrew * e estou imaginando se ela é razoavelmente equilibrada com outras raças.

Eu removi o buço como a idade, etc. e deixei as partes importantes.

Minha conclusão pessoal é que possivelmente no lado strong, mas ainda dentro dos limites do poder.

Ability Score Increase.

Your Intelligence score increases by 2, and your Charisma score increases by 1.

Size.

Most illithids are taller than humans, but their bodies are slender, weighing much less than an average being of their stature. Your size is Medium.

Speed.

Your base walking speed is 30 feet.

Darkvision.

You have darkvision up to a range of 60 ft.

Magic Resistance.

You have advantage on saving throws against spells and other magical effects.

Mind Blast.

You may use your action to attack anything in front of you with a mind blast. When you use your mind blast, each creature in a 15 ft. cone must make an Intelligence saving throw equal to 8 + your Intelligence modifier + your proficiency bonus.

A creature takes 2d6 psychic damage on a failed save, and half as much damage on a successful save. This damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. After you use your mind blast, you can't use it again until you complete a short or long rest.

Devour Brain.

If you consume the brain of a recently deceased creature, you briefly interface with its mind. By doing so, you learn at least one piece of useful information the creature knew.

Telepathy.

You can speak telepathically to any creature within 120 feet of you. A creature understands you only if the two of you share a language.

Languages.

You can speak, read, and write, Common and Undercommon, and can read and write Qualith.

* Não me lembro onde encontrei isso, então peço desculpas ao criador a quem não posso creditar.