Mind Flayer/Green Dragon hybrid (young)

Amphibious. The hybrid can breathe air and water.

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

Innate Spellcasting (Psionics). The hybrid’s innate spellcasting ability is Intelligence (spell save DC 15). It can innately cast the following spells, requiring no components:

At will: detect thoughts,[spell[levitate[/spell]

1/day each: dominate monster, plane shift(self only)

Multiattack. The hybrid can use its Frightful Presence. It then makes three attacks: one with its tentacles/extract brain and two with its claws.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Poison Breath (Recharge 5–6). The hybrid exhales poisonous gas in a 60-foot cone. Each creature in that area must make a DC 18 Constitution saving throw, taking 42 (12d6) poison damage on a failed save, or half as much damage on a successful one.

Tentacles. Melee Weapon Attack: +8 to hit, reach 15 ft., one creature. Hit: 15 (2d10 + 4) psychic damage. If the target is , medium or smaller, it is [condition]grappled[condition] (escape DC 15) and must succeed on a DC 15 Intelligence saving throw or be [condition]stunned[condition] until this grapple ends.

Extract Brain. Melee Weapon Attack: +7 to hit, reach 5 ft., one incapacitated creature of small to large size with a brain is  [condition]grappled[condition] by the hybrid. 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 hybrid 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 [condition]stunned[condition] 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.