Lost Caverns of Tsojconth

The Lost Caverns of Tsojcanth

The cover of The Lost Caverns of Tsojcanth, with art by Erol Otus. The artwork depicts a group of adventurers confronting a behir.
Code	S4
TSR Product Code	9061
Rules required	Advanced Dungeons & Dragons 1st edition
Character levels	6-10
Campaign setting	Generic or Greyhawk
Authors	Gary Gygax
First published	1982 (1976)
Linked modules
S1 S2 S3 S4

The Lost Caverns of Tsojcanth is an adventure module for the Dungeons & Dragons fantasy role-playing game. It was written by Gary Gygax and published by TSR in 1982 for the first edition Advanced Dungeons & Dragons (AD&D) rules. The 64-page adventure bears the code "S4" ("S" for "special") and is set in the Greyhawk campaign setting. It is divided into two parts, a 32-page adventure, and a 32-page booklet of monsters and magic items. The plot involves the player characters investigating rumors of lost treasure. After traversing a wilderness and two levels of dungeons, the players face Drelnza, the vampiric daughter of long-deceased archmage Iggwilv.

The Lost Caverns of Tsojcanth is a revised and expanded version of The Lost Caverns of Tsojconth, a tournament adventure that Gygax wrote for 1976 WinterCon V gaming convention. Gygax expanded the tournament adventure by adding a wilderness area, with part of it based on earlier work by Rob Kuntz. Work on the adventure delayed the completion of The Temple of Elemental Evil, another Gygax adventure. The Lost Caverns of Tsojcanth was included in the 1987 supermodule Realms of Horror, and updated for v3.5 in an online edition in 2007. It was well received by critics, ranked the 22nd greatest Dungeons & Dragons adventure of all time by Dungeon magazine in 2004. A White Dwarf reviewer gave the adventure 9/10, noting its difficulty and rewards of powerful magic. It is part of a series along with S1: Tomb of Horrors, S2: White Plume Mountain, S3: Expedition to the Barrier Peaks. It also has a loosely connected sequel: The Forgotten Temple of Tharizdun.