Magic: The Gathering Comprehensive Rules Changes - Ravnica: City of Guilds to Guildpact

Old rule (Ravnica: City of Guilds)	New rule (Guildpact)
Creature [Click to view all changes.]
Creature Creature is a type. The active player can play creatures only during his or her main phase when the stack is empty. When a creature spell resolves, its controller puts it into play under his or her control. See rule 212.3, "Creatures."	Creature Creature is a type. The active player may play creatures during his or her main phase when the stack is empty. When a creature spell resolves, its controller puts it into play under his or her control. See rule 212.3, "Creatures."

Old rule (Ravnica: City of Guilds)

New rule (Guildpact)

Creature

Creature is a type. The active player can play creatures only during his or her main phase when the stack is empty. When a creature spell resolves, its controller puts it into play under his or her control. See rule 212.3, "Creatures."

Creature

Creature is a type. The active player may play creatures during his or her main phase when the stack is empty. When a creature spell resolves, its controller puts it into play under his or her control. See rule 212.3, "Creatures."