Resurrectionist are Walkers who specialize in the retrieval of corpses or bodyparts for the purpose of ritual and magic.
Mules are magi who settled on a career of ferrying goods between dimensions instead of going poking around ancient terrors and reality-rending disasters.
Spooks are wizards, warlocks, and witches who use their magic for a corporate or government peycheck. They are the MiB, the web of conspiracies, the poor bastards who has to go out and get that rampaging monster.
