Guildmasters' Guide to Ravnica is a sourcebook that details the Ravnica campaign setting for the 5th edition of the Dungeons & Dragons fantasy role-playing game published in November 2018. The world of Ravnica was originally created for the Magic: The Gathering collectible card game and first appeared in the card set Ravnica: City of Guilds, which was released in 2005. It is a high-magic world with a loose Slavic flavor, and features a single city which spans the entire planet that is controlled by ten competing guilds of different ideologies. Contents Guildmasters' Guide to Ravnica is a 256-page campaign and adventure guide for using the Ravnica setting, from the collectible card game Magic: The Gathering, in the 5th edition. The book includes a ninety page overview of "the ten guilds of Ravnica along with the Tenth District where most of the guilds operate. There's also nearly 40 pages dedicated to building adventures in Ravnica that include hooks to include different guilds. The book also contains about 70 pages filled with stat blocks for the monsters and NPCs that occupy Ravnica". The book expands on game elements for the 5th edition, such as: Five new races — centaurs, minotaurs, loxodon, Vedalkin, and Simic hybrids Two subclass options — the Order Domain Cleric and the Circle of Spores Druid Ravnica themed magic items and treasure Publication history Starting in 2016, James Wyatt, a "longtime Wizards employee who worked on D&D for over a decade before moving over to Magic in 2014", began to write a series of free PDF releases called Plane Shift where various Magic: The Gathering planes were adapted for Dungeons & Dragons. The positive response to the "Plane Shift" articles lead to the publication of Guildmasters' Guide to Ravnica, the first full hardcover Dungeons & Dragons guide to the Magic setting. The book's cover and full listing were leaked early on Amazon in July 2018. Guildmasters' Guide to Ravnica was published on November 20, 2018 and features cover art by Magali Villeneuve. Wyatt was the lead designer on the book and he stated "this book is, essentially, Plane Shift: Ravnica". Nathan Stewart, director of Dungeons & Dragons, said in a press statement: "With the huge surge in popularity of D&D and Magic's commitment to bring the lore and storytelling to life, the timing seemed perfect. Ravnica is full of adventure possibilities and I can't wait for fans to jump