Buulwarth

Ambusher. In the first round of combat, the buulwarth has advantage on attack rolls against any creature it surprised.

Blood Frenzy. The buulwarth has advantage on melee attack rolls against any creature that doesn't have all its hit points.

Keen Hearing and Smell. The buulwarth has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Legendary Resistance (3/Day). If the buulwarth fails a saving throw, it can choose to succeed instead.

Natural Predator. If there is a target beyond 30 feet but within 60 feet of the buulwarth, it can use Dash as a bonus action to reach it.

Pounce. If the buulwarth moves at least 20 feet straight toward a creature and then hits it with a bite attack on the same turn, that target must succeed on a DC l7 Strength saving throw or be knocked prone.

Snow Camouflage. The buulwarth has advantage on Dexterity (Stealth) checks made to hide in snowy terrain.

Unstoppable Fierceness. If the buulwarth's health is reduced to a quarter of its maximum hit points, it now deals an extra hit dice on all of its attacks and its speed is doubled.

Multiattack. The buulwarth makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 20 (3d8 + 7) piercing damage. On a hit, the target must make a DC 17 Constitution saving throw or be poisoned for 1 minute. While poisoned in this way the creature is also paralyzed. A poisoned creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Claws. Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 23 (3d10 + 7) slashing damage.

The buulwarth can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The buulwarth regains spent legendary actions at the start of its turn.

Claw Attack. The buulwarth makes a claw attack.

Detect. The buulwarth makes a Wisdom (Perception) check.

Move. The buulwarth can move up to half its current movement.

Bite Attack (Cost 2 Actions). The buulwarth makes a bite attack.