A One-Round Living Greyhawk Dyvers Regional Adventure From the introduction: Blackthorn Discovered! These two words have set the city ablaze. Merchant prepare to flee the city, warriors sharpen their sword and the commoners wait in fear and apprehension. Now, in a city where information in bought and sold alongside silk, the race is on to discover more about the humanoid activity there. A one-round regional adventure set in Dyvers for [player characters] level 1 - 15.