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

Pack Tactics. The wolf has advantage on attack rolls 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.

Infected bite. a bite attack is successful on a creature, it takes 1d6 poison damage, followed by a  successes a DC13 con saving throw, on a fail they are poison for 1 hour.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 2) piercing damage. If the target is a creature, it must succeed on a DC 11 Strength saving throw or be knocked prone;

Infected bit.Melee Weapon Attack: 1d4 poison damage. If the target is a creature, it much succeed on a DC 13 con saving throw or be poisoned for 1 hour