Oh, we got this thing, called the Traveller. Found us on Earth at a bad point. So it gave us a golden age. Technology like you wouldn't dream. Distant moons beyond the asteroid belt terraformed. Hell, even Mercury turned int a garden world. Amazin' right? Like Magic.

[And he does a slight of hand with one of his coins, flipping it and then pulling it and then having it appear in the opposite hand. Obscenely talented stuff. Even moreso if the person is drunk.]

Well, the Traveller was a little bit of a playboy. Went from place to place collectin' angry exes and then abandoning 'em. So they all decided to come to Earth and throw down and get a piece of what they were all missin'. Supposedly they're precursors to the 'Darkness'.

[He absolutely knows the Darkness is coming. He's heard it in his head. But HAHA! He doesn't have to here! And he loves it!]

Traveller then decided to send all these little 'ghosts' out to go find good warriors to raise to fight for it, send those other species packin'. Those ghosts didn't discriminate all that well. So now we got a bunch of what are basically undead soldiers that can come to life over and over again fightin' a bunch of aliens with really bad attitudes that don't care about collateral so long as they get what they want.

Believe me, I prefer the fluffy monsters here. Easier to satisfy.