- Dungeon description(src)

Hallowed Ossuary is a dungeon in Diablo IV. It is located in the Lonely Drifts in the Fractured Peaks, and grants players the Aspect of Unrelenting Fury.
It is the focus of the side quest "The Dread Martyr."
Lore
The Ossuary was a tomb of martyrs.[1] It is not clear whether it was constructed by the Cathedral of Light or appropriated by them, but the Cathedral used it regardless to entomb their honored dead.[2]
It became a lair for vampires, who corrupted the tombs and whose leader raised the dead. Operating from the Ossuary, the vampires grew in number. Vampire hunter Pomuk Zlicek chased the vampires into the tombs, but was caught in a trap. He wrote down his last note before dying, hoping his death would not be in vain.[3]
Knights Penitent also walked into the same trap. A group of knights lay the body of Lord Avitus in the ossuary, but he arose, having turned into a vampire, and killed all of his entourage bar Cromwell, who managed to escape, albeit severely wounded. Cromwell was able to direct the Wanderer to the ossuary, who purged it.[2]
Objectives
- Collect Animus from Animus Carriers
- Deposit Animus into the Animus Urn
- Travel to the Undercroft of Rebirth
- Return the Bloodstone to the Pedastal: 1
- Defeat the Blood Bishop
Monsters
- Blood Bishop (boss)
- Fangstorm
- Ghoul
- Plague Maggot
- Shambling Corpse
- Vampire Bat