Cave of Illboding Dark

Background
Dolur Axebeard, a coldain shaman stationed at The Great Shelf, has asked for my help in defeating the reanimators who are ultimately behind the creation of the Ry'Gorr skeletons that haunt the battlefield. The dwarves' scouts have pinpointed the location of the reanimators: they can be found in a cave on the Forbidden Ossuary of Ice.