Dretch

5e compatible shield

Small fiend (demon), chaotic evil

Armor Class 11 (natural armor)
Hit Points 18 (4d6 + 4)
Speed 20 ft.

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

Saving Throws 
Skills 
Damage Resistances cold, fire, lightning
Damage Immunities poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 9
Languages Abyssal, telepathy 60 ft. (works only with creatures that understand Abyssal)
Challenge 44930 (50 XP)

Actions

Multiattack. The dretch makes two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 3 (1d6) piercing damage.

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

Fetid Cloud (1/Day). A 10-foot radius of disgusting green gas extends out from the dretch. The gas spreads around corners, and its area is lightly obscured. It lasts for 1 minute or until a strong wind disperses it. Any creature that starts its turn in that area must succeed on a DC 11 Constitution saving throw or be poisoned until the start of its next turn. While poisoned in this way, the target can take either an action or a bonus action on its turn, not both, and can’t take reactions.