Lost Level

The Lost Level makes up the sixth level of Undermountain. It was physically cut off for most off Undermountain's history, but umber hulks have tunnelled in, thus making the level accessible. . Originally a temple complex dedicated to Dumathoin, it also holds the tomb of King Melair.

Dwellers
Duergar Clan

A duergar clan - namely, Clan Ironeye - are plundering this level of Undermountain.

Umber Hulks Umber hulks have burrowed in to this level now wander freely in search of food.

Leaving the Lost Level
The following ways can be used to leave the Lost Level:
 * A tunnel in the north part of this level leading to level 5.
 * A tunnel in the south east part of this level leading to level 7 - Maddgoth's Castle.
 * An archgate to level 9 - Dweomercore.
 * A mirror gate to level 10 - Murial's Gauntlet
 * An archgate, in an empty room, to level 2 - Arcane Chambers.
 * An atchgate, embedded in an archway, to level 4 - Twisted Caverns.
 * An archgate, in an empty room, to level 8 - Slitherswamp.
 * An archgate to level 3 - Sarguath Level.
 * An archgate to level 13 - Trobriand's Graveyard.
 * In the same room as the gate above, an archgate to level 18 - Vanrakdoom.