Hythloth
Hythloth is one of the 7 Anti-Virtue Dungeons. Its values are the opposite of the Spirituality and Humility virtues. The dungeon is located on Fire Island. There are four levels. Hythloth is largely an Abyss dungeon, where Demon Slayer weapons will serve you well. The first two level consist of low level monsters. On three and four, some high level baddies are combined with a mess of spell casting monsters. Put another way, it's a recipe for disaster.
Level 1
The monsters on this level are the Fire Gargoyle, Gargoyle, Hell Hound, and Imp.
Level 2
Trammel
The Northern most corridor on Level 2 has an invisible maze. The only known example of a Gold Belt is on this level.
The monsters on this level are the Demon, Elder Gazer, Gargoyle, Hell Hound, and Stone Gargoyle.
Level 3
The challenge ramps up on this level. There is a one-off here, look for the Unshacked Demon (not unshackled). Look for Stone Pavers on this level because they are actually teleporters. Balron, Demon, Elder Gazer, Gazer, and Stone Gargoyle.
Level 4
The monsters on this level are the Balron, Daemon, Fire Gargoyle, Gargoyle, Gazer, Hell Hound, Imp, and Stone Gargoyle