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)
606.6d. [Click to view all changes.]
606.6d. A player may play a spell or activated ability, or take a special action, only when his or her team has priority. If both players on a team want to take an action at the same time, the primary player decides who takes the action.	606.6d. A player may play a spell or activated ability, or take a special action, only when his or her team has priority. If both players on a team want to take an action at the same time, the primary player decides who takes the action. Each player on a team draws a card during that team's draw step. Each player on a team may play a land during each of that team's turns.

Old rule (Core Set - Ninth Edition)

New rule (Ravnica: City of Guilds)

606.6d.

A player may play a spell or activated ability, or take a special action, only when his or her team has priority. If both players on a team want to take an action at the same time, the primary player decides who takes the action. Each player on a team draws a card during that team's draw step. Each player on a team may play a land during each of that team's turns.