Bilemaw Ghoul

Keen Smell. The bilemaw has advantage on Wisdom (Perception) checks that rely on smell.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 11 (2d6 + 3) piercing damage, plus 9 (2d8) poison damage. If the target is a creature, it is grappled (escape DC 11). Until this grapple ends, the target is restrained and the bilemaw can't use its bite against another target. 

Claws. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (2d4 + 3) slashing damage. If the target is a creature other than an elf or undead, it must succeed on a DC 14 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Bile (Recharge 5-6). The bilemaw spews black bile in a 20-foot cone. Creatures in the area must make a DC 14 Constitution saving throw, taking 27 (6d8) poison damage and becoming poisoned for 1 minute on a failed save. On a success, the creature takes half as much damage and isn't poisoned. While poisoned in this way, a creature has disadvantage on saving throws against being paralyzed.