Overview
OMAC (Michael Costner) is a fictional character appearing in American comic books published by DC Comics. Michael Costner was introduced in OMAC #1 (July 2006) and was created by Bruce Jones and Allan Goldman.
Fictional character biography
Michael Costner, a seventeen-year-old petty thief, spent his entire life in Gotham City; first as an orphan in care of the local orphanotrophy, then scraping his life on the streets, stealing to sate his addiction to heroin.
While still at the orphanotrophy, Michael was infected with the OMAC nanovirus through a contaminated flu-vaccine shot. However, Brother Eye never activated him during the Infinite Crisis events, having lost contact with him as Michael began a life off the grid. Instead, in prevision of a victory by the metahumans, Brother Eye kept Michael as a "sleeper agent", the last unit to be activated only in times of dire need.
Brother Eye's downfall, at the hands of Sasha Bordeaux, signaled that moment. Brother Eye, now spliced between a NORAD hard drive containing the bulk of his core programming and a backup satellite orbiting the Earth, activated Michael, incidentally saving him from a round-up. The Michael-OMAC reveals himself to be problematic from the first moments of being online. While other OMACs had no personality, nor qualms about being used as killing machines, the Michael-OMAC actually rebelled against his programming upon being ordered to kill a female policewoman who was an associate and love interest of Michael. It was later hypothesized that Michael, with his personality submerged by the OMAC programming, actually relived moral imperatives and "school yard rules" from Michael's subconscious, such as "never hitting the girls".
From Wikipedia (CC BY-SA 4.0).