Necros Daleks
In Revelation of the Daleks (1985) Davros creates an army of Dalek mutants by manipulating DNA extracted from humans on the planet Necros, where the terminally ill and the dead are being stored in suspended animation.
Necros Daleks have a similar colour scheme to Imperial Daleks, but the designs are otherwise quite distinct from one another and were realised using different sets of props. Created by Davros, they are portrayed in the serial as a rebel faction while the grey Daleks from the Dalek home-world of Skaro, seen in the final episode, serve the Supreme Dalek.
In this serial Davros' life-support chair is shown hovering a short distance above the ground. In a later scene a Dalek kills two saboteurs apparently from an elevated vantage point, implying that Daleks now share this capability. For DVD releases of the serial from 2005 onward new shots were created to clarify that the Dalek is hovering.
Read more about this topic: Red Dalek