Fey Ancestry.

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

Spider Climb.

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

Sunlight Sensitivity.

While in sunlight, the choldrith has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Web Sense.

While in contact with a web, the choldrith knows the exact location of any other creature in contact with the same web.

Web Walker.

The choldrith ignores movement restrictions caused by webbing.

Actions

Dagger.

Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 5 (1d4 + 3) piercing damage plus 10 (3d6) poison damage.

Web (Recharge 5–6).

Ranged Weapon Attack: +5 to hit, range 30/60 ft., one Large or smaller creature. Hit: The target is restrained by webbing. As an action, the restrained target can make a DC 11 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10; 5 hit points; vulnerability to fire damage; immunity to bludgeoning, poison, and psychic damage).

Spellcasting.

The choldrith casts one of the following spells, using Wisdom as the spellcasting ability (spell save DC 12):

At will: guidance, thaumaturgy
1/day each: bane, hold person

Bonus Actions

Spectral Dagger (Recharges after a Short or Long Rest).

The choldrith conjures a floating, spectral dagger within 60 feet of itself. The choldrith can make a melee spell attack (+4 to hit) against one creature within 5 feet of the dagger. On a hit, the target takes 6 (1d8 + 2) force damage.

The dagger lasts for 1 minute. As a bonus action on later turns, the choldrith can move the dagger up to 20 feet and repeat the attack against one creature within 5 feet of the dagger.

Environment: Underdark

Choldrith