Reality bomb
From Tardis Wiki, the free Doctor Who reference
The Reality bomb was a superweapon created by Davros.
The weapon made use of the 27 planets of the Medusa Cascade captured by the New Dalek Empire along with the unique energy source of the Crucible. This bomb was capable of wiping the entire universe and existence except for those within or near the Crucible. The reality bomb was planned to destroy all other forms of life except the Daleks.
The Doctor was successful with his companions in preventing the use of the weapon. (DW: Journey's End)
