A One-Round Living Greyhawk Dyvers Regional Adventure
From the introduction:
While enjoying a quiet day in Dyvers, you receive an oblique invitation to a secret meeting with the guildmaster of the Dweomercrafter’s Guild. As you look at the imposing towers of the guild looming over the walls surrounding the royal district, you have to wonder: what manner of subterfuge are you getting involved in?
A pivotal module to the future of Dyvers for [character levels] 10 - 16.