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.

Skill: Perception

Skill: Stealth

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 ft. of the creature and the ally isn't incapacitated.