From the introduction: A Two-Round Living Greyhawk DM's Challenges High-Level Option Adventure Packet for 16th- to 20th-Level Characters Living Greyhawk DM's Challenge 1 For the Wail of the Banshee Queen Story Arc (2007 - 2008) ... A demon lord needs your assistance. What could he tell you that would make you want to offer your help? The balance of power on the Outer Planes may be in your hands. DM’s Challenge 1 is Part One in the four part Wail of the Banshee Queen Story Arc (2007-2008).