Today I've been thinking about specifically adapting this module as perhaps a starter to Astonishing Swordsmen & Sorcerers of Hyperborea second edition as an introductory module. There are several reasons but specifically because this is an instantly classic TSR module with an solid base as an introduction & its easily placed within the confines of the Diamond desert.
As an introduction to the AS&SH setting B4 The Lost City serves several functions within the confines of the TSR classic adventure. First of all the inhabitants, factions, etc. of the underground Cynidiceans and their hungry god, Zargon make perfect stand ins for the Hyperboreans of AS&SH. The whole sale DYI dungeon aspect of B4's dungeons, rooms, etc. & there are a lot of them are perfect places to introduce the newer weird monsters of second edition AS&SH. Because B4 is an introductory adventure it can be used as a stand in for the infamous Hyperborean vaults from the time of the 'Green Death'.
This basically gives the perfect excuse to try out the newer mummy types from the new second edition mummies and undead sections which might make very interesting & challenging priests of Zargon. This adds an interesting twist to many of the factions presented in B4. These factions suddenly go from silly to deadly in a quick flip of the dice. But there are several other things going on here.
Priest of Zargon
One of the things that I've done with B4 in the past couple of years is use its environs as the final resting place of Ymir’s Serpent from 'The Ghost Ship of the Desert Dunes.' This adventure is pretty well set up to deal well with this sort of a situation. This is one of those adventure that can be easily adapted to your own style of play.
"Somewhere in the depths of Diamond Desert lie the skeletal remains of Ymir’s Serpent, a legendary Viking longship. In days of yore, Sigtrygg Forkbeard led his company upriver, piercing the desert’s hostile heart. There the Vikings unearthed a lost mine brimming with green diamonds, but the River Æolus desiccated as the Serpent prepared for launch, and the ship was swallowed by the dunes. Forkbeard and his company were never seen again, but tales of a shimmering Viking ghost ship gliding over the dunes persist to this day."
The Diamond Desert is outright strange, brutal, and highly dangerous as described in Astonishing Swordsmen & Sorcerers of Hyperborea second edition. Because this second edition fills in so many gaps there is still plenty of room for customization on the DM's part. Weird monsters and dangerous circumstances are all a part of the creative DNA of B4 'The Lost City' add in the Diamond Desert aspect of a nasty and dangerous angle & its perfect material to really bring home the pulpy and dangerous aspects of this classic module.