Cyberslaves were humans converted into shambling cyborgs by a Nanoform infection from Cybermats. Their bodies were human in shape but metallic, completed with a Cyber Helmet.
They were able to attack by firing lightning out of their hands. The Cyberslave conversion process took at least fifty minutes. As they were only slaves, they weren’t as intelligent as other races, making them similar to Cybershades.
Their only thoughts were death and orders. After the Cyberman army and the Cyber-Lord awoke, the Cyberslaves were deemed unnecessary and their purpose fulfilled. They were all destroyed, including Elizabeth Meadows.
The Cybermen were a “race” of cybernetically augmented humanoids. They varied greatly in design, with different factions throughout time and space.
The two major groups, from which all other known versions derived, were the Mondasian Cybermen, which originated on the planet Mondas – Earth’s twin planet in the Doctor’s universe – and the Cybermen created by Cybus Industries, which originated on Earth in an alternate universe known by the Doctor as Pete’s World.