• Intended for Dungeon Masters of all experience levels, this essential resource provides incredibly useful tools and advice for running your D&D game.
• Includes real-world examples of common pitfalls for Dungeon Masters, along with suggestions for how to handle them.
• 15 new, ready-to-use, reusable maps for homebrew adventures.
• Multiple handouts and resources for keeping track of campaigns.
• Presents Greyhawk as a customizable, ready-to-use campaign setting for Dungeon Masters. Set your adventures within Greyhawk or use it as a foundation for worlds you create.
• More than 300 new and improved treasures and magical items, including 18 brand new magical items.
• Contains rules for bastions, strongholds built and controlled by players. With crafting, base-building, and resource gathering, bastions are a fun between-session option for players.
• Easily find information on key D&D characters and locations with the Lore Glossary.
• Includes a double-sided poster map depicting Eastern Oerik from the Greyhawk setting and the city of Greyhawk.

- description by Wizards of the Coast, publisher