A One-Round Living Greyhawk County of Urnst Regional Adventure From the introduction: The Crook of Rao was supposed to have banished all of Iuz's fiends from Oerth, but something has survived. Pray that your previous adventures have strengthened you to be able to deal with a growing threat before the Old One can unleash another army of demon-spawned monsters... An adventure for characters level 3 - 8.