Dretch

Small Fiend (Demon), Chaotic Evil

AC: 11

Initiative: +0 (10)

HP: 18 (4d6 + 4)

Speed: 20 ft.

STR
12 (+1)
DEX
11 (+0)
CON
12 (+1)
INT
5 (-3)
WIS
8 (-1)
CHA
3 (-4)

Resistances: cold; fire; lightning

Immunities: poison

Condition Immunities: poisoned

Senses: Darkvision 60 ft., Passive Perception 9

Languages: Abyssal; telepathy 60 ft. (works only with creatures that understand Abyssal)

CR: 1/4 (XP 50; PB +2)

Habitat: Planar, Abyss

Actions

Rend.

Melee Attack Roll: +3, reach 5 ft. Hit: 4 (1d6 + 1) Slashing damage.

Fetid Cloud (1/Day).

Constitution Saving Throw: DC 11, each creature in a 10-foot Emanation originating from the dretch. Failure: The target has the Poisoned condition until the end of its next turn. While Poisoned, the creature can take either an action or a Bonus Action on its turn, not both, and it can't take Reactions.

Find this creature in the encounter builder

Dretch

Source: Stranger Things: Welcome to the Hellfire Club, p. 103 - Licenses and attribution