Griffin Aherne Dark Heresy
Landunder is an unusual Hive World of the Imperium of Man located in the Malfian sub-sector of the Calixis Sector. The tectonically unstable planetary crust floats freely on a deep chemical ocean of water and dissolved strategic minerals. Every Hive City on Landunder is built to cling underneath the planetary crust in suspension using now-lost advanced gravitic technology.
There are eight of these “hanging” undercities, containing almost a billion inhabitants. Landunder’s rich export trade derives from ocean-depth mining and chemical treatment of the recovered minerals as the undercities’ processing plants exploit the curious and lucrative mix of oceanic chemicals.
Stable Warp routes run from Landunder to Malfi and The Lathes and many Imperial merchants choose to make the run to deliver these highly-sought after chemical additives to the larger population centres of the Calixis Sector and the wider Imperium.