Asmodeus' Lair

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Asmodeus' Lair
Location Level 2–7 of
Bones Yes
Mappable Yes
Teleportable No
Diggable floor Yes
Diggable walls Maze only

Asmodeus' Lair is a special level somewhere between the 2nd and 7th levels of Gehennom (and therefore between DL 27 and DL 36).

This level is eligible to leave bones files. The entire level is no-teleport.

The following information pertains to an upcoming version (NetHack 3.7.0). If this version is now released, please verify that it is still accurate, then update the page to incorporate this information.

The demon lairs are no longer no-teleport levels, but the presence of the demon lord or prince will block others from teleporting.


|..|..|.... &>..|....................................|

The lair itself constitutes the core of the level, and is surrounded by undiggable walls. The remainder of the level is filled with ordinary Gehennom-like maze, and contains the upstair (which will always be on the left-hand side of the level).

The right-hand room contains three random &, and a fire trap, a magic trap, and an anti-magic trap, placed at random. The room with the downstair is occupied by Asmodeus, a ghost, and a horned devil; three random V and a random L are placed randomly within the left side of this area. The marked traps are a fire trap just inside the door of Asmodeus' room, and a spiked pit in the top-left chamber; additionally, two magic traps, a sleeping gas trap, an anti-magic trap, and another fire trap are placed randomly within the left side of the area, as are three scrolls, two weapons, two pieces of armor, two potions, and a gem (all chosen randomly).


This level is notorious for being extremely irritating to navigate: the walls of the lair core shown above are undiggable, and the stairs are always somewhere to the left of the lair, meaning that it's necessary to walk all the way to the right side of the level and then all the way back to the left to move between the stairs. Further, the level is no-teleport. There are a couple of ways you can circumvent this:

  • On the way down, you can dig a hole near the stairs so you only have to deal with it in one direction.
  • On the way up, you can quaff a cursed potion of gain level to go directly up one level. You will end up in a random place on the level above as if you had levelported in. This works even with the Amulet, although the mysterious force still applies.
  • In either direction, you can polymorph yourself into a phasing monster such as a xorn and pass through the walls. This is rarely useful because it's time-consuming and annoying to remove armor and polymorph just to cross one level (not to mention dangerous if your only source of magic resistance is your armor and the Wizard of Yendor shows up while you're polymorphed).
  • You could also level teleport past, but this is probably a waste of a teleport scroll, and of course it doesn't work when you have the Amulet.


SpliceHack changes the layout of the layout of the lair significantly, adding a fortress, a river and drawbridges.

This page is based on a spoiler by Dylan O'Donnell. The original license is:

Redistribution, copying, and editing of these spoilers, with or without modification, are permitted provided that the following conditions are met:

  1. The original contributors to any spoiler must continue to be credited.
  2. Any modifications to the spoiler must be acknowledged and credited.

This page may need to be updated for the current version of NetHack.

It may contain text specific to NetHack 3.4.3. Information on this page may be out of date.

Editors: After reviewing this page and making necessary edits, please change the {{nethack-343}} tag to the current version's tag or {{noversion}} as appropriate.