Hel Hea Bound. Quiet Requiem is magically bound to the master or hunter so long as the master lives whenever Quiet Requiem dies it reforms as a ball of light and reforms itself fully during a long rest.

Instinctive Flank. If the creature is within 5 feet of a creature that a member of the pack is within 5 feet of, this creature deals an extra 1d6 damage on a hit.

Silent Predator. This creature has advantage on stealth checks. It also deals an additional 2d6 damage for the first hit it deals when combat begins. 

Multiattack. Makes two melee attacks

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) slashing damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d10 + 4) piercing damage. If the target is below half HP or is bloodied, the bite deals an additional 1d6 damage. 

Study. This creature studies one enemy, and when it does, it also increases damage against this enemy by 1d4 for every time it studies the enemy. This bonus is able to stack up to 4d4 upon one enemy and it can only be done to one enemy at a time.