From the introduction: Welcome to Ravnica! Ravnica's vast, worldwide cityscape is a patchwork of grand halls, decrepit slums, and ancient ruins, with layer upon layer of stonework—and guild maneuverings. Of the world's countless civic centers, one looms large above all others: the City of Ravnica, a metropolis so vast that its name has long since become synonymous with the entire plane. It is here, amid the mazes of streets and towering Gothic spires, that Ravnica's guilds vie for power.