Return to Ravnica is a Magic: The Gathering block, consisting of Return to Ravnica, Gatecrash, and Dragon's Maze. It is the second block set on the plane of Ravnica, after the Ravnica block, and again focuses on the multicolor cards and ten guilds of Ravnica. Return to Ravnica focuses on five guilds: the Izzet League, Cult of Rakdos, Golgari Swarm, Azorius Senate, and Selesnya Conclave. Gatecrash focuses on the other five guilds: the Boros Legion, House Dimir, The Orzhov Syndicate, The Gruul Clans, and The Simic Combine. All ten guilds appear in Dragon's Maze.

Magic: The Gathering is a tabletop and digital collectible card game created by Richard Garfield. Released in 1993 by Wizards of the Coast, Magic was the first trading card game and had approximately fifty million players as of February 2023. Over twenty billion Magic cards were produced in the period from 2008 to 2016, during which time it grew in popularity. As of the 2022 fiscal year, Magic generates over $1 billion in revenue annually.