Ivar turns from the dark, crowded Bronx streets of Morrisania to a lime-green door covered with black and red graffiti. Beyond the door is a stairwell, a pretty dark one, too. It goes down about two levels. At the bottom is a small dark space, the bottom of the stairwell, and a pair of ugly black-leathered dwarfs with the Trollhammer insignia tattooed onto their faces.