Gug

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

The gug makes two Claw attacks and uses Chew.

Melee Attack Roll: +10, reach 10 ft. Hit: 22 (3d10 + 6) Slashing damage. If the target is a Medium or smaller creature, it has the Grappled condition (escape DC 16) from one of two claws.

Dexterity Saving Throw: DC 18, up to two Medium or smaller creatures Grappled by the gug. Failure: The gug places the target in its mouth and chews. A chewed creature is no longer Grappled but has the Restrained condition. While Restrained in this way, a target has Half Cover against attacks and other effects not originating from the gug and takes 10 (3d6) Piercing damage at the start of each of the gug's turns. A gug can have a maximum of four creatures in its mouth at a time.

A creature in the gug's mouth can take an action to make a DC 16 Strength (Athletics) check. On a successful check, the target is no longer Restrained and moves to an unoccupied space within 5 feet of the gug. If the gug dies, a target is no longer Restrained and can escape from the gug using 5 feet of movement, exiting with the Prone condition.