After a quick montage of grinding, it's time to do one last thing in Anor Londo with another child of Lord Gwyn, the Dark Sun Gwyndolin. And yes, Gwyndolin IS a dude. After a quick fight with him though, it's time to head down into the flooded, haunted ruins of New Londo.
By the way, the song at the beginning is Moonlight Sonata, remixed by an awesome guy at "Meets Metal" He's got a Youtube channel! Go check him out!