Ravnica is a fictional city-world in the Magic: The Gathering universe, known for its vast urban landscape and diverse cultures. It is home to ten distinct guilds, each representing different philosophies and magical abilities. The guilds include Azorius, Boros, Dimir, Izzet, Golgari, Selesnya, Orzhov, Rakdos, Gruul, and Simic. The city is characterized by its sprawling architecture, intricate politics, and a rich history of conflict and cooperation among the guilds. Ravnica serves as a central setting for many Magic: The Gathering card sets and stories, showcasing the interplay of magic, strategy, and community within its vibrant environment.