The caverns are made of many long underground tunnels, and a Sixth House shrine in the last section.
Ilunibi is divided into five sections:
Carcass of the SaintEdit
This is the entrance section, there are waterfalls and steep rock walls. The rest of the cave is mostly flooded to about knee-deep and filled with various Ash and Corprus creatures as well as one dead adventurer. There are two exits — one to "Tainted Marrow" on the southeast and one to "Marowak's Spine" on the southwest.
This section of Ilunibi contains one dead adventurer with random equipment, several ash creatures, one leveled Daedra, and two exits to "Marowak's Spine."
"Marowak's Spine" is flooded, and contains Ash, Daedric, and undead creatures, a Dreamer, and a dead body. One exit leads back to the "Carcass of the Saint," two lead sideways to the "Tainted Marrow," and one leads onward to the next section, "Blackened Heart."
This section contains undead creatures. The entrance to the final section, "Soul's Rattle," is guarded by a random Daedric creature.
This area contains random 6th House creatures and Dreamers as well as one Daedric creature. It is the home of Dagoth Gares, a unique Ash Ghoul and keeper of this 6th House shrine, Dagoth Gares will only appear during the "Sixth House Base" quest.
It also contains many treasures, such as scrolls and chests with gold and jewels. But the real treasure are the Fists of Randagulf found behind the most eastern trough in Dagoth Gares' room.
- All leveled creatures within Ilunibi are set to appear only if the PC's level is greater than or equal to three. This means that at levels one or two, the cave is only inhabited by seven dreamers, making any planned expeditions into Ilunibi arguably far easier than at higher levels.
- Marowak's Spine is a reference to the bone-clad Pokemon Marowak.