49 years ago - Sam Scudder is born.
33 years ago - 16-year-old Sam begins breaking into homes.
25 years ago - 24-year-old Sam steals a small antique mirror that becomes his lucky charm.
20 years ago - 29-year-old Sam is caught and sent to prison. He is allowed to keep his mirror.
19 years ago - 30-year-old Sam watches as a person escapes from his mirror, dying & crumbling to dust instantly, revealing it to be a portal to a magical mirror universe which Sam begins exploring.
17 years ago - 32-year-old Sam uses his mastery of mirrors to escape prison & become the Mirror Master.
13 years ago - 36-year-old Sam flees from Reverse-Flash, hiding in Dublin, but is killed shortly after storing his equipment.
While the modern day Rogues are among the best villains in all of DC thanks to the careful character building of Mark Waid and Geoff Johns, it's actually really hard to get the original versions of the characters to make any sense at all. Virtually every one of them is simply a guy who invented some device that breaks reality... whether it's just spontaneously learning how to spin their body at super speeds or to control the weather, It generally stands that these powers could stand at least a LITTLE bit more explanation.
In the case of the original Mirror Master, he invented a mirror that holds a image longer. In a prison workshop. That's how he starts.... and that simply doesn't hold water. So we need some sort of function that we can put in place in his story that allows his powers to work. Inasmuch as the most common function of his powers is hiding things inside or behind mirrors, or to move things or people through mirrors, we conceived of a magical mirror-based plane that he's learned to access. By accidentally coming into possession of an artifact that accesses this mysterious dimension which he has time to study and manipulate, He starts to make at sense, at least within a comic-book reality. The most credibility-straining part of the story now is that he was able to keep a stolen watch-lucky charm in prison, but I feel like we can just let that one go.
We're building a series of power struggles within the Rogues, and Sam makes a convenient casualty of those struggles, as we have the modern Mirror Master in Evan McCulloch waiting in the wings to take over. Because of Evan's role in the Suicide Squad, this is one of the first members of the Rogues we've worked on, but it gives us a good model to follow going forward.