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 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.
Loyalty. Immune to spell effects that turn it against its . Gains +1 to all saves and attack rolls when within ten feet.
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.