Dark Fissure is a cave located southeast of Cheydinhal and east of the Reed River. Inside the cave the Hero will find various undead creatures (Zombies, Skeletons, Liches, etc.) and human necromancers, as well as leveled dungeon loot.
When first doing the quest, Necromancer's Moon, it is possible to grab a Black Soul Gem from the Altar when the Necromancer makes it at 12:30 am.
As part of the further investigation of the necromancers and the deaths of two of their mages, Raminus Polus asks that the Hero head to Dark Fissure cave to find out more about the black soul gems.
- For those interested in Black Soul Gems, it should be noted that the cave itself does not have any known gems to loot, though there is a small chance of finding one on a Necromancer.