Wretched Pack Tactics. The sorrowsworn has advantage on an attack roll against a creature if at least one of the sorrowsworn's allies is within 5 feet of the creature and the ally isn't incapacitated. The sorrowsworn otherwise has disadvantage on attack rolls.
Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit:6 (1d10 + 1) piercing damage, and the sorrowsworn attaches to the target. While attached, the sorrowsworn can't attack, and at the start of each of the sorrowsworn's turns, the target takes 6 (1d10 + 1) necrotic damage.
The attached sorrowsworn moves with the target whenever the target moves, requiring none of the sorrowsworn's movement. The sorrowsworn can detach itself by spending 5 feet of its movement on its turn. A creature, including the target, can use its action to detach the sorrowsworn.
The Shadowfell's pervasive melancholy sometimes gives rise to strange incarnations of the plane's bleak nature. Sorrowsworn embody the forms of suffering inherent to the shadowy landscape and visit horror on those who stumble into their midst. Each sorrowsworn personifies a different aspect of despair or distress.