Modern Horror/Action/Secret Fantasy in Boston

[rosignol]

Originally Posted by Icelander

I'm leaning toward monsters of all sorts having been all but eliminated from this world, but there being some dimensional pathways where they can enter it now that magic has come back.

Are you familiar with the 'mana cycle' concept from the Shadowrun setting? It sounds a lot like what you're thinking of, on a much longer (thousands of years) schedule.