Publication:The Lost Caverns of Tsojcanth
The introduction, with instructions that the Dungeon Master read it aloud to the players, outlines that there is a treasure in the Yatil Mountains south of the Greyhawk realm of Perrenland. The player characters must investigate rumors of a lost treasure that scores of adventurers have perished attempting to find. The treasure is a remnant of the wealth amassed by the archmage Iggwilv, former ruler of Perrenland, prior to her presumed death at the hands of the demon Graz'zt, whom she had "imprisoned and forced into servitude.":2 The players must first traverse a wilderness area with 20 numbered encounters before arriving at the caverns. The encounters have names such as "Border Patrol" (encounter 1) and "Hill Giants" (encounter 10). After the wilderness are two lettered encounters: the "Gnome Vale", which includes a map for their lair, and "The Craggy Dells", where humans and orcs are capturing hippogriffs to sell.
Next, the player characters reach the caverns. They consist of the "Lesser Caverns" with 22 encounters, and the "Greater Caverns" with 20 encounters, each with its own map. The lesser caverns include encounters such as "Stinking Cave" (encounter 5) which contains four trolls and "Underground Lake" (encounter 14). The greater caverns include encounters such as "Uneven-Floored Cavern" (encounter 5) where the player characters face an umber hulk and "Canyon of Centaurs" (encounter 9). The 20th and final encounter is titled "The Inner Sphere". Here, a "woman sleeps on an alabaster slab." She is "armored from toe to neck in gold chased plate mail.":29 The woman is actually Drelnza, a fighter/vampire and the daughter of Iggwilv. After defeating Drelnza, the players are rewarded with treasure, and the adventure ends.
The Lost Caverns of Tsojcanth is a revised and expanded version of The Lost Caverns of Tsojconth, a tournament adventure that Gygax wrote for WinterCon V, a gaming convention sponsored by the Metro Detroit Gamers (MDG) in 1976. It is based in part on one of Rob Kuntz's dungeon levels, as Kuntz helped Gygax revise the tournament version. This original version consisted of eight loose sheets, an outer folder, and a zip-locked bag; only several hundred copies were printed. In the May 1980 issue of Dragon, Gygax said "Rob Kuntz has the reworked Lost Caverns module which must be finalized" and that "We want to get it into print as soon as possible." Lawrence Schick later suggested that "there's evidence that Gary considered Tsojcanth part of a longer Greyhawk campaign, placing the adventure between T1–T4 The Temple of Elemental Evil and WG4 The Forgotten Temple of Tharizdun. (By this reckoning, The Village of Hommlet, The Temple of Elemental Evil, and Tsojcanth are thus the "lost" WG1 through WG3 modules.) So, Tsojcanth was published in the S series because it got completed out of order, but was too good to delay."
In 1980, Gygax began rewriting the adventure for first edition AD&D, expanding it to include outdoor encounters. The redevelopment of The Lost Caverns of Tsojcanth was one of the major delays in the completion of The Temple of Elemental Evil. This version of the module was revised and expanded, and included two 32-page books, and an outer folder. In the November 1981 issue of Dragon, Gygax said that TSR needed a competition-level module and that "the effort needed to finish the second hundred or so pages of Elemental Evil went into preparation of The Lost Caverns of Tsojcanth. The scenario was initially done for a convention tournament, but the new product has an extensive outdoor adventure and a completely new series of encounters". While in the middle of working on Temple of Elemental Evil, Gygax added a complete outdoor story arc to the original tournament story arc that leads to the caverns. The Lost Caverns of Tsojcanth includes new spells, and many new monsters which were later featured in Monster Manual II.
The Forgotten Temple of Tharizdun (1982) starts off from an event in The Lost Caverns of Tsojcanth and features monsters from the Fiend Folio. In 1987, The Lost Caverns of Tsojcanth was revised and included in TSR's "supermodule" Realms of Horror. In 2007, it was updated to v3.5 and included as one of three parts in Iggwilv's Legacy: The Lost Caverns of Tsojcanth, an adventure available online from Wizards of the Coast.
Both versions of the module included monsters that were later included other Dungeons & Dragons products. The monsters introduced in the original un-published version were updated for AD&D rules and included in the first edition Monster Manual. Monsters appearing in the published version included the demon princes Baphomet, Fraz-Urb'luu, Graz'zt, and Kostchtchie, who later appeared in the original Monster Manual II. The published module's cover features an illustration of a behir by Erol Otus. :cover
All four modules of the S-series were included as part of the Dungeons of Dread hardcover collection, released on March 19, 2013. Lawrence Schick writes in the foreword that "S4 The Lost Caverns of Tsojcanth marked the end of the S series—and rightly so, because despite being based on a gilded-hole dungeon originally designed for a tournament in 1976, its updated version really belonged more to the '80s campaign-setting school of design than to the wild-and-woolly '70s. S1 through S3 were standalone modules that could be easily dropped into any DM's campaign, but Tsojcanth is firmly based in Gary's World of Greyhawk."