Monsters are real.
But so are heroes.
Sparks are champions of weird science. Boasting capes and costumes and amazing super-powers that only make sense if you don't think about them too hard, they fight an eternal battle for truth and justice . . . mostly.
Darklings are creatures of myth and magic: ghosts, vampires, were-beasts, and the like. Their very presence warps reality. Doors creak at their approach. Cobwebs gather where they linger.