Unreal Bite. Wampus' biting attacks ignore AC bonuses granted by heavy and medium armor. Normal Piercing damage is inflicted, even on creatures that resist or are immune to Piercing damage. Magical Armor pierced by the Wampus' bite loses all magical properties.

Frenzy. If the Wampus is set ablaze its attacks each gain 1 extra dice and its movement speed is increased by 50%.

Rushing Horror. If the Wampus is attacking a creature in a tunnel, hallway, corridor, bridge, or other narrow pathway it gains advantage on attack rolls.

Trample. Any time the Wampus moves through a space occupied by another creature of equal or smaller size, that creature must succeed a Dexterity Save of 20 or be trampled. A trampled creature is knocked prone, takes 1d8 bludgeoning damage, and any creatures that witness the trample are Frightened for 1d6 turns.

Raining Pain. The Wampus has advantage on all attack rolls made against prone targets.

Impervious Shadow. The Wampus takes half damage from prone targets, and deals double damage to them.

Waking Nightmare. If the Wampus is woken from its sleep it takes no damage from attacks for the first 2 rounds of combat, moves at double normal speed, and cannot be put back to sleep.

Pain Elemental. Each time Poison Glare or Crippling Blow are triggered, the Wampus recovers 1d10 hitpoints and its attacks gain +3 damage permanently.

Multiattack. The Wampus makes 2 Paw Swipes or can perform a Seizing Lunge and then a Bite.

Articulate Teeth. The Wampus' speed is halved and can perform an Articulated Bite as a reaction to a melee strike. This effect can be cancelled out of as a bonus action.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 22 (2d12 + 8) piercing damage.

Paw Swipe. Melee Weapon Attack: +3 to hit, reach 10ft., area in front of the Wampus, Hit: (2d10 + 11) bludgeoning damage. 1d6 Bludgeoning damage on miss.

Seizing Lunge. Melee Weapon Attack: +2 to hit, reach 25ft., one target. Hit: (4d6 + 6) bludgeoning damage. Target creature is now prone.

Bristle. The Wampus recovers 2d6 hit points and gains +3 AC until the next round. If any creatures are Frightened of the Wampus, the Wampus gains an additional 1d6 hit points and 1 AC for each. The Wampus can Bristle once per turn as a bonus action.

 Articulated Bite. Melee Weapon Attack: +10 to hit, reach 5ft., one target. Hit:  (4d12 + 8) piercing damage. The target is Restrained and cannot recover hit points for 1d6 turns after the bite. Teeth must be articulated before this action can be taken.

Crippling Blow. After being struck with a melee attack, the Wampus may swing out with its nearest free paw dealing 1d10 + 11 bludgeoning to the attacker, this attack never misses. If the attack does 16 or more damage, the target is Paralyzed and Frightened. Recharges on 5-6.

Poison Glare. After being struck with a magic or psychic attack, the Wampus turns to lock eyes with its attacker. The caster must succeed a Wisdom save DC 26 or be Paralyzed and Frightened. Recharges on 5-6.

Mule Kick. Melee Weapon Attack: +10 to hit, reach 5ft., one target. Hit:  (1d12 + 8) bludgeoning damage. If an enemy strikes the Wampus from behind, the Wampus instinctively kicks with one or both rear legs to deliver a powerful blow.