With the Daleks distracted by the aftermath of the rust plague, the Monstrons land on Skaro inside a dormant volcano without meeting any resistance. They are detected, however, and a Dalek is dispatched to investigate on a hoverbout. The Monstrons' Engibrain soldiers freeze it with liquid air. Two more Daleks go to investigate but are killed when they come in contact with the Monstons' force field. They then launch an attack on the Dalek City, beginning with a bombardment before using their Anti-Visibility Thruster to blind the Daleks with thick layers of fog. The Daleks are forced to seal themselves inside their City against the fog. The Engibrains are sent fourth to raze the City. The Dalek Emperor fears the Daleks are powerless to repel the attack, then the roof collapses. The Monstrons