Decem Factiones
Decem Factiones is a world ruled by 10 guilds, each with their own territory and loyalties.
- Azorius Senate. The Azorius Senate functions as the government of Decem Factiones, built on the three columns of a legislative, a judicial, and an executive branch under the leadership of lsperia, the sphinx Supreme Judge.
- Boros Legion. Led by the angel Aurelia, the Boros Legion pursues the cause of justice, not merely law enforcement. Boros serves as Decem Factiones's standing army.
- House Dimir. House Dimir is in the business of information, operating an espionage organization behind a facade of messengers, investigators, and archivists. Its enigmatic leader, Lazav, wears many faces.
- Golgari Swarm. An elf lich named Jarad guides the Golgari Swarm 's masses as they lurk in the Undercity, where they process the city's waste and see to the new life that emerges from death and decay.
- Gruul Clans. Raging against civilization and its defilement of the natural world. the loose alliance of the Gruul Clans is led by the cyclops Borborygmos.
- Izzet League. Led by the dragon Niv-Mizzet, the Izzet League is a guild of scientists and engineers who build and sustain Decem Factiones's infrastructure while conducting wild experiments in magic efforts that usually involve barely controlled elemental energy.
- Orzhov Syndicate. A sinister combination of church, bank, and organized crime syndicate, the Orzhov Syndicate is controlled by the Obzedat, a cabal of ancient spirits often called the Ghost Council.
- Cult of Rakdos. The demonic Cult of Rakdos is the jester in Decem Factiones's culture, using satire and performance to skewer the powerful and embolden the weak. But it is a cruel and bloodthirsty jester, in the manner of its demonic leader, and it supplements parody and levity with blood and fire.
- Selesnya Conclave. The Selesnya Conclave is led by Trostani, three dryads who are fused together with one another and with Mat'Selesnya. a manifestation of the soul of the world. The guild seeks to bring nature and the city into balance.
- Simic Combine. Under the leadership of Prime Speaker Zegana, the biomancers of the Simic Combine apply magic to the life sciences. Striving to create a harmonious future where creatures of all kinds are perfectly adapted to their ever-changing environment, the Simic magically hasten the process of evolution and adaptation of life
