Rakdos dwells inside Rix Maadi, a guildhall built around a lava pit in the undercity. The most direct route to Rix Maadi is down an immense stone staircase that leads down an ancient tunnel carved deep into the earth by a wurm and enforced with thick stone pillars. Rakdos members call this subterranean passage the Demon's Vestibule. The crumbling walls of the tunnel are covered in colorful banners and old bloodstains. These faded and ripped banners depict all manner of grotesque acts as well as promote diversion clubs and "festivals." This creates a dark carnival tone even before you reach Rix Maadi. As you descend into the undercity, the temperature rises. Everything is cast in a red glow from the veins of molten rock that branch across the walls and ground. Before Ravnica became covered in city, this section was a volcano. The top of the volcano was long ago stripped away and replaced by buildings, but the molten core and lava pits are still intact.
Rix Maadi stands at the far end of a courtyard, its ornate stone edifice flanked by jagged basalt pillars flowing with lava streams. Tattered cloth banners hang limply from metal spikes and ominous red light pours out through the giant doorway. The façade of Rix Maadi is the only part of the guildhall that resembles an actual building. Inside, Rix Maadi is a large natural cavern with a high ceiling where "chimneys" ventilate the immense underground chamber.