Alvega

Alvega was the planet closest to Skaro. It was the homeworld of the Amarylls and their Controller, which was situated at the core of Alvega. The planet was covered in rich vegetation and had almost no animal life save for giant earthworms.

History
When the Daleks first achieved space flight, Alvega was the first planet they attempted to conquer. A group of Daleks were sent to the planet as the Dalek Fleet moved further into space. The Controller and the Amarylls fought back, resulting in most Daleks and Amarylls being lost. The last surviving Dalek reached the Controller and destroyed it, causing the planet to explode. The Dalek Emperor observed the explosion and decreed that whatever the Daleks could not conquer, they would destroy. (COMIC: The Amaryll Challenge)