Dretch

Small Fiend (Demon), Chaotic Evil

AC 11 Initiative +0 (10)
HP 18 (4d6 + 4)
Speed 20 ft.

Resistances Cold, Fire, Lightning
Immunities Poison; 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)

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.