Gallifreyan shock troop
From Tardis Wiki, the free Doctor Who reference
Gallifreyan shock troops were specialised Gallifreyan troops used by the Time Lords against the Daleks during the Last Great Time War. Among the equipment they possessed was a pendant which allowed them to stay precisely ten nanoseconds in time ahead of their opponents, which they used to avoid getting "mowed down" on ground assaults. Such a pendant was taken by the Eighth Doctor as a "souvenir", which he used to escape the Sanukuma. (AUDIO: The Rulers of the Universe)