#OnThisDay in 1958 #MirrorMaster debuted in @dc.com #TheFlash #comics #105 #convict #SamScudder devotes himself toDevelopAbility to enter #mirrorsAndReflectiveSurfaces & #inventsMirrorManipulatingTech to torment #TheSilverAgeFlash #BarryAllen both meet their supposed end in #CrisisOnInfiniteEarths40