Oh No, Who Turned Out The Lights In Anor Londo?!

I’ve been playing Dark Souls recently, getting much farther than I ever have before and enjoying myself greatly. Two days ago, after several attempts and a run back to the sewers to farm some rats for Humanity, I finally defeated the infamous Ornstein and Smough (as well as the jackasses that guard the room they hang out in ) and was able to proceed into what I’m told is the second half of the game. But first, the finale of the first act: upstairs from Ornstein and Smough is a chamber, golden light overflowing into the hallway outside.