Cyberlord

Cyberlord is a supervillain from Champions Online and the nemesis of the Canadian superhero Justiciar - he is fought by Justiciar and the player-created hero during Whiteout where he attacks with a gigantic army of robots as well as his "partner-in-crime", the player-created Nemesis.

Prior to this Cyberlord and Justiciar had a rivalry going back to when Justiciar had a terrible accident, his father called on Cyberlord to save his son - which the villain did, transforming Justiciar into a cyborg.

However Cyberlord would be betrayed by Justiciar when the hero rebelled against his evil ways and for a long time Justiciar believed his nemesis to be dead - of course as of Whiteout it has become clear Cyberlord is far from dead.