From the front page of the PDF:
A One-Round D&D LIVING GREYHAWK®
Iuz’s Border States Metaregional Adventure
So many times the Drinkers have sent you on missions of seemingly random importance. So many times they’ve told you to ignore the evils you may see on your mission. So many times you’ve been told not to get distracted and sacrifices are necessary to bring down the Old One. Well, this time it’s different. This time, you’re going to go fix one of the first evils you saw and this time that IS the mission. A one round adventure for APLs 8 to 16.