In the wastes of Telos, far away from their tombs and cities, the failed upgrades roam.
The Cybermen have no use for these failures and simply dump them on the planets surface. Often though these ruined creatures have a spark of life left in them, a continuence of the driving force embedded in their brains from the start of the conversion process…..
WE. WILL. SURVIVE.
Scavenging, primal, zombie like creatures, their mechanical voices wailing in pain, despair and loss joining with the wind that scours the barren surface of the planet.