Twisted Caverns

The Twisted Caverns made up the fourth level of Undermountain. Originally, it served as the home of a kuo-toa tribe, although they were driven out by an aboleth - Illuun.

Inhabitants
Aboleth

Illuun, an aboleth, along with its pet chuuls and enslaved troglodytes. The kuo-toa tribes are furious, for its presence taints the underground lair, killing the fish that fuels the kuo-toa.It has it's lair in a body of water in the middle of this layer

House Auvryndar

A drow expedition from level 3 of Undermountain have a base on this level.

Kuo-toa

Kuo-toa have lived on this level for years, but are now driven out of the lake and nesting area they previously inhabited by Illuun the aboleth (see above).

Fungi

The caves in the north-west part of this level contain numerous, unique species of fungi, a lot of which, surprisingly, have useful or edible properties.

Leaving the Twisted Caverns
The following ways can be used to leave this level of Undermountain:
 * A tunnel in the north-west part of this dungeon leads to Level 3.
 * Cruising down the river which ran through the level led to level 5.
 * An archgate to level 6 sits behind spiderwebs in a cave on this level.
 * An archgate to level 2 is present on this level.