Goatstealer

The goatstealer has Advantage on an attack roll against a creature if at least one of the goatstealer's allies is within 5 feet of the creature and the ally doesn't have the Incapacitated condition.

Constitution Saving Throw: DC 12, any creature that starts its turn in a 5-foot Emanation originating from the goatstealer. Failure: The target has the Poisoned condition until the start of its next turn. Success: The target is immune to the Stench of all goatstealers for 1 hour.

Melee Attack Roll: +4, reach 5 ft. Hit: 5 (1d6 + 2) Piercing damage plus 3 (1d6) Poison damage. If the target is a Medium or smaller creature, it has the Grappled condition (escape DC 12). Until the grapple ends, at the start of each of the goatstealer's turns, the target takes 3 (1d6) Poison damage.