A One-Round Living Greyhawk Principality of Ulek Regional Adventure
From the introduction:
Aid comes from an unexpected ally as you set out to retrieve a gift of Ulaa. Somewhere deep below ground lies a key to salvation. But what price will this cost, and who will pay it? Those PCs who have previously fought Malevolence are ineligible to participate.
A Principality of Ulek regional adventure for APLs 2-12, and Part Four of the Gems of Ulaa series.