Time dam
From Tardis Wiki, the free Doctor Who reference
Time dams were a device used to stop time in certain area. Queen Xanxia used Time dams to prevent her death. Locking her true self in the last few seconds of her life she created a "projection" of herself in the hope that the energy gained by Zanak mining other planets could stabilize her in the new form. The dams were destroyed when the Bridge was blown up. (DW: The Pirate Planet)
