Here are some notes on The Elsewhere, a reality that adjoins with the world in which our campaign is played; the realities intersect, as most adventurers have reason to suspect, but your characters will probably only know hints and rumors about the following. (Still, they’ll know more than the average person.)
This alternate PC Race is not really a PC “race” at all: I guess the best way to describe it is as a subrace of humans who have undergone a bizarre experience that has transformed them, for better and worse. It’s inspired by world folklore, as well as by the White Wolf game Changeling (though I only know a little about the game), as well as films like Night Watch and Pan’s Labyrinth. (Oh, and a little inspiration from Frank Mitchell’s Cambion race for LotFP.)
Imagine being abducted by a being like the faun in Pan’s Labyrinth, or by Elder Gods from the Cthulhu Mythos, or djinn, or the grey aliens of American UFO mythology, and kept prisoner (and slave) in their bewilderingly alien world. Imagine being changed by force to better serve them, and then imagine escaping or being spit back out into your own world, forever changed. That’s what a Changeling is.
A warning: this class is experimental, wild, and pretty complicated—and the description is long since there’s variety of possible powers and flaws available. I don’t recommend the class for a newbie player’s first character.