A perpetual haze of dreary rain hangs over the spires of Ravnica. Bundled against the weather, the cosmopolitan citizens in all their fantastic diversity go about their daily business in bustling markets and shadowy back alleys. Through it all, ten guilds - crime syndicates, scientific institutions, church hierarchies, military forces, judicial courts, buzzing swarms, and rampaging gangs - vie for power, wealth, and influence.