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

Pack Tactics. The Vine Wolf has advantage on an attack roll against a creature if at least one of the wolf's allies is within 5 feet of the creature and the ally isn't incapacitated.

Vines. The Vine Wolf can use its action to attempt to grapple a creature up to its size or one size larger. If trying to grapple a creature one size larger the roll is made with disadvantage. If the roll succeeds the target is restrained and may make a DC13 Strength saving throw at the end of its turn. 

Part of Nature. As the Vine Wolf is made of plants, it easily blends in with green environments. Whenever attempting (Stealth) in a green forest area, you roll with advantage. 

Multiattack. The Vine Wolf makes two attacks: one bite and one claw attack. 

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) piercing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone.

Claws. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 13 (4d4+3) slashing damage.