As a baby, Scottish mercenary Evan McCulloch is left on the doorstep of an orphanage run by a Mrs. McCulloch, with nothing but his first name and a photograph of his parents. He grows up fairly normal and around age 8, Evan is sexually assaulted by an older boy, who Evan in self defense kills and drowns in a creek. Never caught, Evan leaves the orphanage at 16 with his parents' photograph.
He settles in Glasgow, taking up a life that leads to crime and eventually takes up employment as an assassin. He becomes one of the most renowned mercenaries in the United Kingdom.
One day, he has two hits scheduled, and due to an eye injury is barely able to make out his second target. After firing his shot, he recognizes the target as his father. At the funeral, Evan sees his mother.
Over the next few days, he tries to work up the courage to see her, but visits her too late, discovering that she has committed suicide. Stricken with grief at the loss of both parents, Evan decides to turn himself in but is instead picked up by a consortium of U.S. government and big business interests offer him the costume and weapons of the original Mirror Master in exchange for his services.
His first assignment is to scare Animal Man into abandoning his animal-rights stance, a mission he fails thanks to the hero's wife. After he is fired and replaced for refusing to actually kill Animal Man's wife and children, McCulloch helps Animal Man track and fight the same men who gave McCulloch his weapons, but his heroism is short lived. He continued to work as a criminal and a supervillain-for-hire. On occasion, he has also worked out of costume as a mercenary in Britain
He moves to Keystone City, and comes into conflict with Wally West, now the third Flash. He discovers a "Mirror Dimension" which enables him to travel through any reflective surface. During the events of Underworld Unleashed, the Rogues accept him as Scudder's successor. After being betrayed by Neron, McCulloch and four of the other Rogues die and go to Hell, only to return after a confrontation between Neron and the Flash. For a brief time, McCulloch is a member of Lex Luthor's initial Injustice Gang and fights the Justice League of America, but abandons the team when Batman offers to pay him twice what Luthor was offering.
During a brief team-up with Captain Cold, Mirror Master was contacted by Brother Grimm about a plan to permanently get rid of the Flash, but when Grimm betrayed Cold and McCulloch by trapping them in a pocket mirror universe in Linda Park's diamond ring, they joined forces with Wally to escape this dimension and confront Grimm's theft of Keystone City, Wally even briefly lending speed to the two Rogues so that they could ensure that Keystone's citizens were all in the city when it returned to Earth while Wally fought Grimm.
He works with Blacksmith in her takeover of Keystone and Central City. When her plan fails, he joins Captain Cold's gang and battles a cocaine addiction. He seems to sober up since the death of Captain Boomerang.
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