The box set includes: The Deck of Many Things cards "are drawn to determine specific elements of the adventure, such as who the villain is.

[1] On July 4, 2018, Mike Mearls, co-lead designer for the 5th edition of Dungeons & Dragons, said "Madness at Gardmore Abbey from 4e is a good adventure, well worth finding on the DMs Guild.

[3] The August 2011 Pax Prime convention featured a prequel adventure written and designed by Townshend called The Siege of Gardmore Abbey.

The Deck of Many Things "premiered in Supplement I: Greyhawk (1975) and has returned in various Dungeon Master's Guides (1979, 1989, 2000, 2003) over the years, clearly revealing it as one of D&D's most popular magic items.

In fact, two of the four adventure books focus on patrons, rivals, and the physical details of the Abbey, creating a sandbox full of options.

When Wyatt wrote out his order for the Encounters, he told his designers that he didn't want a 'combat slog', but instead a 'mix of combat, roleplaying, and skill challenges'.