Yanìs Chronicles:
Savage Crowns

Zonduey is the dark lord of inescapable death, known as the Raging Reaper and the Undying Curse.

It is the evil traitor of the gods who denies the sovereignty of the King of all Gods of the Ring, and plans to return and seek terrible vengeance.
Moss, vultures, and haematite are sacred to Zonduey and required in sacrifices and ceremonies. Its priests wear black robes with primarily dark grey and purple decorations, and are skilled in combat with waraxes, a weapon capable of tearing and dismembering its victim's flesh, shredding it to pieces and pandering to the killer's anger.

Zonduey is the lord of the Darkness Plane and the deity of lost and restless souls. Initially revered only as the deity of death, the inevitable path to which all mortal souls are linked, it assumed the role of deity of undeath and master of all those souls who reject the judgment of Caamiran and wander aimlessly. These are souls who are inherently linked to the living world, having cast a curse or sworn vengeance beyond death.
Due to its imprisonment, Zonduey has little power and influence over the lives of mortals. There are few cultures that worship it, mostly to avoid the enmity of other deities. Many rely on Zonduey as the deity of oblivion, particularly those who want to impose themselves on the weakest and force them to forget the joys of a free life. Those who practice necromancy and magical curses turn to it in prayer, especially dark necromancers who have no qualms about animating undead in their service.

When fate allows the imprisoned deity to manifest itself to mortals, it appears as an aberrant undead creature with the body of an anthropomorphic hyena, with a black coat and yellow spots, and a red mane. Its head is completely stripped, revealing only the bloody skull, and it has membranes of flesh that connect its wrists to its hips, resembling bat wings.