Publication:Keep on the Shadowfell
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Kobold raiders are menacing the Nentir Vale village of Winterhaven. They attack the player characters who are also traveling to Winterhaven. When the player characters arrive at Winterhaven, they are asked to clean out the kobold nest. The player characters soon discover that the kobolds are pawns of Kalarel, a priest of Orcus, Demon Prince of Undeath. Kalarel has a lair at a nearby ruined keep that contains the Shadow Rift, once a gateway to the Shadowfell and is no longer in use. Kalarel plans to reopen the Shadow Rift to connect the material world to Orcus's temple in the Shadowfell. This unleashes an army of undead upon the unsuspecting region. The player characters journey to the keep and descend through its crypts, resulting in a final climactic confrontation with Kalarel.
The adventure was designed by Bruce R. Cordell and Mike Mearls and was first published in May 2008. William O'Connor created the cover art, and Miguel Coimbra and Eric Deschamps created the interior art. Keep on the Shadowfell was the first 4th Edition D&D adventure module to be released. It was released before the core 4th Edition rulebooks were made available, and includes pre-generated characters and a condensed version of many game rules. For early adopters, Keep on the Shadowfell was the first opportunity to play an official D&D 4th Edition product. In April 2009, Wizards of the Coast released an updated PDF version of Keep on the Shadowfell. This updated version fixed many typographical errors throughout the module, revised the presentation and formatting of many encounters, and re-tuned the difficulty of certain key sections by adding or subtracting monsters. This PDF was made available to the public free of charge through Wizards' D&D Test Drive program.