 To make sure this knowledge is not abused, the only way to arm a de-mat gun is by means of the Great Key of Rassilon, whose location is only known to the Chancellor.As a means of extreme sanction, the Time Lords have also been known to place whole planets into time-loops, isolating them from the universe in one repeating moment of time as well as hurling planets from one galaxy to another using a weapon referred only as a magnetron in "The Trial of a Time Lord".In the Eighth Doctor Adventures novel "The Ancestor Cell" by Peter Anghelides and Stephen Cole,<ref></ref> the Time Lords are shown to house other weapons of mass destruction in a stable time eddy known as the Slaughterhouse.