Amoris - Great Cyran Wolf

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.

Loyal Hound.

• Whenever Amoris hits a creature with an opportunity attack, its speed drops to 0 for the rest of the turn. This stops any movement they may have been taking.

• Creatures within Amoris's reach provoke opportunity attacks even if they took the Disengage action.

• When a creature within Amoris's reach makes an attack against a target other than you (and that target doesn't have this feat), you can use your reaction to make a melee weapon attack against the attacking creature.

In wolves clothing. Amoris’s true being cannot be detected or discovered by any ability that would detect her fiendish nature. 

Fleet of foot. Amoris does not suffer movement penalties from difficult  terrain. 

Shape-shifter. Amoris can spend a bonus action to switch between Beast form and Fiend form. In Fiend form Amoris's size becomes Large, gains advantage on saving for magic effects and gains resistance to fire and acid damage as well as immunity to poison damage and the Poison effect.  

Bite (beast form only). Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 12 (2d8 + 4) piercing damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked prone.

Jaws of Kyber (fiend form only). Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 17 (2d12 + 5) piercing (beast form) damage and 6 (1d12) acid damage. If the target is a creature, it must succeed on a DC 17 Constitution saving throw or be knocked poisoned until the end of Amoris's next turn.

Howl from below (recharge 4-6)(Fiend Form Only). Amoris lets out a blood curdling howls, all hostile creatures within 30 ft must succeed on a DC 15 Wisdom save, taking 16 (3d8) psychic damage and becoming frightened until the end of amoris’s next turn. 

 Tactical retreat. Upon Amoris or her rider taking damage she can move up to half her movement without provoking opportunity attacks. This movement is reduced from her maximum movement on her following turn.