Universal reality detonation

Universal reality detonation was the goal of Davros' New Dalek Empire. Based at the Crucible within the Medusa Cascade, they intended to use the reality bomb to destroy not just their own universe but all of reality bar themselves. This was to be done using 27 stolen planets, which were transported from across time and space to the Medusa Cascade via a magnetron. Once the planetary alignment field was activated, the planets would provide the energy needed to detonate the reality bomb

Following a successful test on a collection of humans within the Crucible, Davros ordered the reality bomb detonated. On the order of the Supreme Dalek, the planetary alignment field was activated beginning a countdown of 200 rels to universal reality detonation. Ultimately, however, it was prevented by Donna Noble who, as a result of a Human-Time Lord Meta-Crisis, used newfound Time Lord intelligence to access the ship's systems. (TV: Journey's End)