Devil's Sight.

Magical darkness doesn't impede the neogi's darkvision.

Mental Fortitude.

The neogi has advantage on saving throws against being charmed or frightened, and magic can't put the neogi to sleep.

Spider Climb.

The neogi can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Actions

Multiattack.

The neogi makes one Bite attack and one Claw attack, or it makes two Tentacle of Hadar attacks.

Bite.

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) piercing damage plus 14 (4d6) poison damage, and the target must succeed on a DC 12 Constitution saving throw or become poisoned for 1 minute. A target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Claw.

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (2d4 + 3) piercing damage.

Tentacle of Hadar.

Ranged Spell Attack: +6 to hit, range 120 ft., one target. Hit: 14 (3d6 + 4) necrotic damage, and the target can't take reactions until the end of the neogi's next turn, as a spectral tentacle clings to the target.

Spellcasting.

The neogi casts one of the following spells, using Charisma as the spellcasting ability (spell save DC 14):

At will: guidance, mage hand, minor illusion, prestidigitation
1/day each: dimension door, hold person, hunger of Hadar

Bonus Actions

Enslave (Recharges after a Short or Long Rest).

The neogi targets one creature it can see within 30 feet of it. The target must succeed on a DC 14 Wisdom saving throw or be magically charmed by the neogi for 1 day, or until the neogi dies or is more than 1 mile from the target. The charmed target obeys the neogi's commands and can't take reactions, and the neogi and the target can communicate telepathically with each other at a distance of up to 1 mile. Whenever the charmed target takes damage, it can repeat the saving throw, ending the effect on itself on a success.

Environment: Hill, Underdark

Neogi Master