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.
Pounce. If the panther moves at least 20 ft. straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 12 Strength saving throw or be knocked prone. If the target is prone, the panther can make one bite attack against it as a bonus action.
Snow Camouflage. The wolf has advantage on Dexterity (Stealth) checks made to hide in snowy terrain.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 3) piercing damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw or be knocked prone.