Davros claimed that the planet Antalin had been terraformed to resemble Skaro and was destroyed in its place. A subterfuge to destroy Daleks aligned to Davros; both on Skaro (Antalin) and those that remained hidden within Dalek ranks on Skaro (original). Despite finding evidence of threat to Skaro via evidence found on 22nd century earth of Davros' mission to 1960s Earth and seeing the event via time-tracking equipment, the Dalek Prime allowed the destruction of Skaro to destroy Daleks allied to Davros. Dalek Prime also claimed that the Dalek/Movellan war (and indeed most of Dalek history before the destruction of "Skaro")
Davros ultimately releasing the virus to kill off the Daleks before they can exterminate him. Davros expresses a desire to build a new and improved race of Daleks, but he apparently succumbs to the virus himself before he can escape, his physiology being close enough to that of the Daleks for the virus to affect him. But in the Sixth Doctor story "Revelation of the Daleks", Davros goes into hiding as "The Great Healer" of the funeral and cryogenic preservation centre Tranquil Repose on the planet Necros. There, creating a clone of his head to serve as a decoy while modifying