Anti-gravity device

An anti-gravity device was acquired and utilised by a Dalek as it fought to escape the Vault, enabling it to pass over manholes as well as to ascend or descend its way through flights of stairs. (NOTVALID: The Last Dalek)

Behind the scenes
The anti-gravity device was identified in the video game The Last Dalek, based on the television story Dalek. It was acquired in Level 3.

It is probably based on the anti-gravitational disc from Planet of the Daleks.