Small Fiend (Demon), Chaotic Evil
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.
Found on p.104 of MM2025 (Free Rules)