In 1963, Ice Warriors attempted to create a giant sonic cannon at the North Pole. It was powerful enough to erase continents and damage the outer plasmic shell of a TARDIS. The Fifth Doctor stopped them. (COMIC: 4-Dimensional Vistas)
In 2012, the Ice Warrior war criminal, Arakssor, was awoken from his imprisonment in Antarctica. He planned to use a sonic cannon there to heat up the greenhouse gases of Earth to use Earth as his "fortress" and to reclaim Mars. (AUDIO: Frozen Time)
During the Siege of Trenzalore, three Ice Warriors planned to use a sonic cannon, its components encased in ice to sneak past the Papal Mainframe's sensors, to bury the town of Christmas in an avalanche, along with the Eleventh Doctor. The Doctor used his sonic screwdriver to amplify the device, causing it to explode, destroying the Warriors and instantly vaporising the ridge they were on. (PROSE: Let it Snow)
Behind the scenes
- A CGI model of an Emperor's Personal Guard with a no standard manipulator arm was made for The Parting of the Ways.