Bunyip

Brave. The bunyip has advantage on saving throws against being frightened.

Hold Breath. The bunyip can hold its breath for 1 hour.

Keen Hearing and Smell. The bunyip has advantage on Perception checks that rely on hearing or smell.

Multiattack. The bunyip makes a bite attack and two slam attacks.

Bite. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 19 (2d12+6) piercing damage and the target is grappled (escape DC 17). Until this grapple ends the target is restrained and the bunyip can't bite another target.

Slam. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 17 (2d10+6) bludgeoning damage.

Terrifying Howl. The bunyip unleashes a terrifying howl. Each creature of its choice within 120 feet that can see and hear it makes a DC 17 Wisdom saving throw, becoming frightened for 1 minute on a failure. A creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creatures saving throw is successful or the effect ends for it, the creature is immune to the bunyips Terrifying Howl for the next 24 hours.