The original Codex Necrons . It ' s listed in the end of the book as one of four worlds Mars Rumored resting place of the Void Dragon . Pavonis The Nightbringer ' s tomb world . Naogeddon Where the Deceiver fetches a Necron device in Deus Ex Mechanicus . UNKNOWN OBJECT Massive deepspace object shunned by the Tyranids . Also in the original Codex Necrons , there is an interview with the insane TechAdept Corteswain who claims to have been abducted to an Inverted World of a Machine God where the horizon stretched up into the sky , wrapping around a star that seemed close enough to touch . Aside from the Void Dragon , the Nightbringer , and the Deceiver the Outsider is the only other C ' tan mentioned in the original codex , strongly suggesting that Corteswain ' s realm of madness is the domain of that one remaining god , and that it is the one depicted at the end of the book .