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.

Multiattack. The neogi makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +4 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: +4 to hit, reach 5 ft., one target. Hit:6 (1d6 + 3) slashing damage.