Isolated along a rough Warp-route at Thule’s far rimward edges, Marnine has few resources or other appealing features. It had attracted only desultory settlement eforts, but ofworld traffic has increased recently from a group obsessed with the deep caves that puncture the surface. Despite Aeldari raids, the rumours of spectacular discoveries underground have attracted growing attention. It is only a matter of time before an official Adeptus Administratum presence is established and Imperial Law enforced, but until then there are few limits to what might be achieved here.