Advanced Search >

Classic Modules Today: S4 The Lost Caverns of Tsojcanth (5e)
Quick Preview
Full‑size Preview

Classic Modules Today: S4 The Lost Caverns of Tsojcanth (5e)


In 1982, TSR published the module named “The Lost Caverns of Tsojcanth” with the module code “S4”. It was written by Gary Gygax, and illustrated by Jim Holloway, Erol Otus, Jeff Easley, and Stephen D. Sullivan. It consisted of two 32 page booklets. The first dealt with the wilderness trek to find the caverns, as well as the caverns themselves. The second detailed new monsters and magical items not previously published. In 2004, for the 30th anniversary of the Dungeons & Dragons game, Dungeon magazine ranked this module the 22nd greatest adventure of all time.

This conversion guide allows DMs to run the original module with 5th Edition rules and provides a reference sheet for encounters. It is intended for 5-6 characters of levels 7-10.

To use this conversion guide you will need an original copy of S4: The Lost Caverns of Tsojcanth.

"Classic Modules Today: B4 The Lost City" contains the OpenOffice/LibreOffice source files used to create this PDF. Visit for instructions on creating your own classic module conversions and selling them on the DMs Guild.

Updated to include page references for magic items.

 Customers who bought this title also purchased
Reviews (1)
Discussions (5)
Customer avatar
Terrelle S May 18, 2018 8:12 am UTC
Hey Mark, I missed it last time, but i just checked out the latest update, and found that for Drelnza, there are only two legendary actions listed for her, when she should have 3.
Which (probably) is missing a XXX (costs 2 Actions) ??

Thanks for your hard work, i do like the changes you made in the update.
Customer avatar
Daniel P March 20, 2018 2:49 am UTC
If you want maps for this, check out my webpage here at (copy/paste link):

Customer avatar
Terrelle S October 09, 2017 5:19 pm UTC
Magic Item i found missing from the 5e update guide:
Wilderness Encounters - Wyvern Roost
1) Elven Chainmail - It probably needs to be updated to "Elven Chain" from pg.168 from DMG
Customer avatar
Mark S October 11, 2017 4:38 pm UTC
Thanks for catching that Terrelle! I'll update the guide to fix it.
Customer avatar
Mark S October 12, 2017 4:42 am UTC
Customer avatar
Nod H January 04, 2017 10:39 pm UTC
The conversion is handy but is missing some sections from the original module.The lettered encounter areas from pages 9-12 are not represented at all in the conversion guide that I could find.
Customer avatar
Mark S January 05, 2017 4:41 am UTC
Thanks Nod H. This was my first conversion and I missed some things. I'll get up updated copy uploaded soon!
Customer avatar
Mark S January 05, 2017 5:34 am UTC
The missing encounter areas have been added, and a new version uploaded.
Customer avatar
Peter B November 27, 2016 6:55 am UTC
The conversion appears to be missing the xeg-yi and xag-ya (from the end boss room). Would it be possible to update the conversion with these? It would be much appreciated, as I'm going to be doing this module soon with my group. Otherwise, fantastic conversion!
Customer avatar
Mark S December 04, 2016 4:51 am UTC
Thanks Peter! Just uploaded an updated conversion with the missing creatures.
Browse Categories
 Follow Your Favorites!
NotificationsSign in to get custom notifications of new products!

Product Information
Electrum seller
Community Content
Rules Edition(s)
Original electronic
Scanned image
These products were created by scanning an original printed edition. Most older books are in scanned image format because original digital layout files never existed or were no longer available from the publisher.

For PDF download editions, each page has been run through Optical Character Recognition (OCR) software to attempt to decipher the printed text. The result of this OCR process is placed invisibly behind the picture of each scanned page, to allow for text searching. However, any text in a given book set on a graphical background or in handwritten fonts would most likely not be picked up by the OCR software, and is therefore not searchable. Also, a few larger books may be resampled to fit into the system, and may not have this searchable text background.

For printed books, we have performed high-resolution scans of an original hardcopy of the book. We essentially digitally re-master the book. Unfortunately, the resulting quality of these books is not as high. It's the problem of making a copy of a copy. The text is fine for reading, but illustration work starts to run dark, pixellating and/or losing shades of grey. Moiré patterns may develop in photos. We mark clearly which print titles come from scanned image books so that you can make an informed purchase decision about the quality of what you will receive.
Original electronic format
These ebooks were created from the original electronic layout files, and therefore are fully text searchable. Also, their file size tends to be smaller than scanned image books. Most newer books are in the original electronic format. Both download and print editions of such books should be high quality.
File Last Updated:
April 13, 2018
This title was added to our catalog on April 07, 2016.