"Yes. This is Ravnica, a world covered entirely by city. One-thousand-and-twenty-three years ago, ten organizations known as the Guilds agreed to share power over Ravnica. They cast a powerful spell called the Guildpact to bind the organizations to their parts of the agreement and bind those of us who were not members of a Guild to nonetheless be subservient to them. Twenty-five years ago, the magical part of the Guildpact finally ceased to function. Since then there have been rebellions against the guilds and wars between them, and the guilds have finally begun to change and adapt rather than stagnating in the complacency of unchallengeable supremacy. But for the most part, the guilds still rule the world and fulfill their ancient functions in it.
One of the Guilds is the Izzet Leage, an organization of engineers, technicians and physicists of which the dragon Niv Mizzet is founder and permanent head. They maintain, or used to maintain, much of the city's infrastructure. Since the Guildpact expired, however, It has increasingly seemed as though Mizzet is becoming less concerned with securing the guild's position or maintaining vital infrastructure than with pursuing some grand secret project. So much so that he has redirected much of the guild's resources towards mysterious ends while dams burst and streets flood. So I've been trying to find out what that project could be.
The project seems to involve, among other things, mapping Ravnica's leylines and streets and trying to find some grand secret structure built into both. I thought a leyline geologist who wasn't from Ravnica might be able to provide a useful perspective. But when I tried to summon one, someone else nearby cast a spell to make spells go wrong, and as a result my spell apparently summoned a metamancer instead."