As always, I like to pop my head in the Unknown Armies threads that crop up to say that if you want a feel for what a campaign could be like, try reading "Last Call" by Tim Powers. It's got archetypes and assumption, the desperation of immortals, the magical underpinnings of the Fisher King, the American West, and mob-built Las Vegas, and the symbolism behind tarot cards. The rest of the series "Expiration Date" and "Earthquake Weather" explore the themes from different directions, with vaping ghosts and the secret history of California wine-making, but "Last Call" itself is strongly Unknown Armies-coded.