Magic: The Gathering Comprehensive Rules Changes - Core Set - Ninth Edition to Ravnica: City of Guilds

Old rule (Core Set - Ninth Edition)	New rule (Ravnica: City of Guilds)
Main Game [Click to view all changes.]
Main Game One card (Shahrazad) allows players to play a Magic subgame. The "main game" is the game in which Shahrazad was played. See rule 506, "Subgames."	Main Game Some cards allow players to play a Magic subgame. The "main game" is the game in which the spell or ability that created the subgame was played. See rule 506, "Subgames."

Old rule (Core Set - Ninth Edition)

New rule (Ravnica: City of Guilds)

Main Game

One card (Shahrazad) allows players to play a Magic subgame. The "main game" is the game in which Shahrazad was played. See rule 506, "Subgames."

Main Game

Some cards allow players to play a Magic subgame. The "main game" is the game in which the spell or ability that created the subgame was played. See rule 506, "Subgames."