A One-Round Living Greyhawk County of Urnst Regional Adventure
From the introduction:
"The Dungeons of Ventnor..." No other phrase strikes more fear in the hearts of the good citizens of the County of Urnst. Now you've been ordered to wade through legions of infernals (where did they come from?), walk boldly into the dungeon (like you own the place), locate the most dangerous man in the County (just one guy), and bring him back. Yeah... right.
A County of Urnst module for characters level 2 - 12.
Part 9 of the Lordmaker Series.
This scenario used the product code COU instead of the more-typical URC.