Gallowglass | Locations | Visited regions The Sheol XVII-System is infamous for its penal colonies which are in great parts maintained by the Adeptus Custodes and often sponsored by the Adeptus Mechanicus. The brotherhood is said to practice all forms of experimental penitential methods with its science labs in the system. The Inquisition discreetly also sponsors and looks after the Sheol XVII system. It is rumoured to be the perfect place for ditching or silencing individuals without sentencing them to death. Prisons of Sheol XVII: