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.
