The New Decree
Along with sworn peace, there are a few laws that all had to acquiesce to when signing the Guildpact. These are:
1. It is forbidden to change the shape of any person or animal to resemble another being, whether through transmutative or illusory magic.
2. It is forbidden to use illusory magic to deceive any citizen of Ravnica.
3. It is forbidden to use gunpowder as a weapon.