Keen Hearing and Smell. The briarwolf has advantage on Wisdom (Perception) checks that rely on hearing or smell.   Pack Tactics. The briarwolf has advantage on its attack roll against a target if at least one of the briarwolf's allies is within 5 feet of the target and that ally isn't incapacitated.   Briarblast. After being struck by a melee attack in combat, the spines of the briarwolf will flare outward much like that of a porcupine. If the creature is struck in this fashion again, the spines erupt outward with an immense amount of force in nearly every direction. All adjacent creatures must make a DC 13 Dexterity saving throw or suffer 2d6 piercing damage.