The Guildpact was a powerful and ancient work of world-binding magic, drafted ten-thousand years ago by Azor I and signed by the paruns of Ravnica’s ten guilds. It was conceived as a means to maintain the balance of power in the city, an enchantment meant to preserve the law and allow for compromise between the ten guilds. It was created as a response to the growing chaos and warfare on the plane at the time, and each of the paruns had a say in the creation of the Guildpact.
Because it was fundamentally layered into the fabric of the plane itself, all beings on Ravnica were subject to the rules of the Guildpact, which had very specific guidelines and statutes woven into it. Those who violated it could easily be subdued if found, as the magic of the Guildpact would render even the most powerful beings stoppable by forces of justice, such as the League of Wojek. Clauses and incentives allowed for a compromise so each guild could serve its intended function and retain a semblance of togetherness, in ensuring the unburdened growth of the city. The day of its signing, the Festival of the Guildpact, was celebrated every year as a reminder of the good the spell did, even as the average citizen wondered why groups like the Cult of Rakdos were allowed to continue their destructive ways under the Guildpact.
Of course, as the centuries wore on the guild leaders would attempt to find loopholes in the Guildpact to exploit and gain more power, and during the Decamillennial celebration, a chain of events was put in motion by the vampire parun Szadek of House Dimir would unravel the Guildpact, its dissolution throwing Ravnica for a time into chaos. Many of the guilds were fundamentally altered, and some were nearly wiped out entirely. Only recently has the city begun to recover from the dissension, now governed by a new set of non-magical rules masterminded by the Orzhov advokist Teysa Karlov, but without the Guildpact’s protective charms the guilds have started preparing for the inevitable conflict.