From HGWiki

Lots of undead type creatures including Poltergeists that summon animated items and if not taken out quickly these can get out of hand. One of the Living Darkness drops the key to open the door to the Morgue of Darkness entrance.

Rest Spawn Chance

Zero

Creatures

• Poltergeist
• Living Darkness
• Witchkin
• Arcane Spectre
• Warrior Spectre
• Rogue Spectre

Exits

• Tower Ruins
• Morgue of Darkness Note: This is a very small area with no passage to the main Morgue due to a rockfall however the Book of Bones item required for the Lich transformation is found here.