From publisher blurb:
An adventure in HYPERBOREA designed for 4–6 characters of 4th to 7th levels. For use with Astonishing Swordsmen & Sorcerers of Hyperborea™ and other traditional fantasy role-playing games.
A millennium has passed since the Green Death swept across Hyperborea. In that bygone age of pestilence, a noble family fled the City-State of Khromarium. Far beyond the walls of the city, they entombed themselves in order to elude the inescapable plague. Their necromancer placed them in a deep slumber from which they never wakened. Also he summoned a mythical serpent to guard the vault, a beast reputed to shed gems for tears from eyeless sockets. Tales speak of this beast as the Sightless Serpent. Now, a knave of Khromarium claims to have witnessed the legendary beast. For a pittance he will lead your party to its trail . . .
- Note: Originally presented in Knockspell Magazine (sans art and professional cartography).