Null Zone weapon

The "Null Zone weapon," as Seratrix referred to it, was a Time Lord device from the Omega Arsenal. When the War Doctor detonated a Time Destructor to destroy the Dalek Time Fleet, (AUDIO: The Innocent) several Time Lords, including Seratrix, gave the Daleks the weapon as a sign of good faith to end the Last Great Time War. The Daleks used it to create the Null Zone with a Thousand Worlds (AUDIO: The Thousand Worlds) as a powerbase and claimed they'd be content to live in peace with the Time Lords. (AUDIO: The Heart of the Battle)