Time Vortex Magnetron

In the alternate timeline of the Time Paradox Incident, the Daleks used a Time Vortex Magnetron which would cause the human guerrillas who had travelled to the 20th century to be drawn to the Daleks' base the next time they used their time machine. By mistake, Jo Grant was drawn in instead. (TV: Day of the Daleks)

The Daleks had developed the Time Vortex Magneton by the closing of the Mechon Wars which were fought in the wake of the Mechonoid Incident. (PROSE: The History of the Daleks)