Spider Climb. The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Web Sense. While in contact with a web, the spider knows the exact location of any other creature in contact with the same web.
Web Walker. The spider ignores movement restrictions caused by webbing.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature.
Hit: (1d8 + 3) piercing damage plus (2d8)poison damage. The target must make a DC 11 Constitution saving throw, taking the poison damage on a failed save, or half as much damage on a successful one. If the poison damage reduces the target to 0 hit points, the target is stable but poisoned for 1 hour, even after regaining hit points, and is paralyzed while poisoned in this way.
Web (Recharge 5-6). Ranged Weapon Attack: +5 to hit, reach 30/60 ft., one creature. The target is restrained by webbing As an action, the restrained target can make a DC 12 Strength check, bursting the webbing on a success. The webbing can also be attacked and destroyed (AC 10, hp 5, vulnerability to fire damage, immunity to bludgeoning, poison, and psychic damage).
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.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: (2d6 + 3) piercing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone