Gate magic. That would fall under the realm of this place being a nexus, which begs the question of who opened the gate then. Hmm...

[This obviously has him delighted. Another theory to bounce off of his boss when he's done here.]

Yes, it is. Although most have been snuffed out and the label "pagan" is somewhat of autonomous with live-action role players, as they call them. Essentially it's a religion where you worship more than just one God. It's very similar in concept to the pokemon Gods I've read about where certain ones encompass specific spheres.