The Cyber-Sidhe demanded tribute from the Mechclans of Earth-01011010 in order for them to grow and prosper. It is unknown whether or not the Cyber-Sidhe started out as part of the Mechclans or what type of sacrifice they called for, but they were feared. They were feared because the Cyber-Sidhe wields something the Mechclans do not fully understand – a thing called life. In fact, members of the group appeared to be part man and part machine although this has not been confirmed. One of their Chieftains, Phinn Mac Mram, wanted to enslave the Mechclans, but in an unexpected turn of events, the Mechclans combined their power and banished Phinn and his army to Earth-616.
Despite being cast out into an unfamiliar world, Phinn still sought to rule it, but the newest agent of A.R.M.O.R. would have something to say about that. Lyra, daughter of the incredible Hulk, stood alone against the Cyber-Sidhe. Her partner, Boudicca, being a technological being herself was infected by the Chromedruids of the Cyber-Sidhe and temporarily taken over. The Chromedruids speak the universal machine language – the Ogham Code – and can infect any type of technology.
In the end, Lyra defeated Phinn, leaving his hordes leaderless.