A One-Round Living City Tournament for Player Characters of Any Level
From the introduction:
Aethalynmur (Ay-the-lynn-mer) is a solar, who when not serving various good deities, spends time in Arrus, his favorite Demi-Plane of Air. His most recent trip there - a few hours ago - made him cringe. An evil human who gained access to the demi-plane has been terrorizing the residents and destroying parts of Nimbus City.