The backstory of the Mist in this timeline is better understood.  Known to be a man named Kyle,  he was born shortly before the turn of the 20th century in Canada, the country where he was raised. He enlisted in the army early during World War I and rose to the rank of Captain quickly. During the latter days of the War, he was station in Europe and became part of the infantry along the German lines. One night, pinned by superior forces, he faced a crisis of character as Germans bayoneted his men and bid to kill them all before the evening was done. Kyle snapped and, in a patriotic rage, led a heroic charge against the Germans. Miraculously, every bullet fired at him missed as he slaughtered his way across the plains and into the German trenches. His men rallied and the Canadian forces held the field. Kyle was awarded the Cross of Valor for his efforts (revealed in Starman vol. 2 #24).

    After the war, Kyle enrolled in college and obtained a degree in the sciences, most like physics. He developed a wide array of inventions using his own funds but met little success in promoting them. The two main inventions he generated was an invisibility solution and a matter destabilizer. The invisibility solution, or "invisio-solution", was a light-refractive liquid that caused a bending of any light that struck it. Objects washed in this solution appeared invisible (introduced in Adventure Comics #67). The matter destabilzer was a more primitive device, but potentially much more powerful. Anything bathed in the rays of this device became structurally unstable and disintegrated. However, at least when originally conceived, the device was unpredictable, having various lag times before the target disintegrated (introduced in Sandman Mystery Theatre #37).

    Disgruntled with his lack of success in Canada, the Mist moved to America and took up residence in New York City. Lacking adequate funds and now victim to an alcohol habit, the Mist took the name Smythe and contacted various criminal elements in the city, using his device as a threat against their enemies. In 1939, he entered into a competition to win a War Department contract to develop technology for the US Army. The public display of his technology was alarming and aroused suspicion regarding several crimes in the area. Pursued by the Golden Age Sandman and drinking heavily, the Mist made a mistake and when contracted by the mob to destroy a building, obliterated the wrong one. The mob took a terrible vengeance, submitting the scientist to his own matter destabilzer and leaving him for dead. The Mist, however, was saved by the very unpredictability of his own device and fled New York City severely injured for his experience. His crimes during this period were never officially solved (Sandman Mystery Theatre #37-40).  The extent to which any of this is true on Earth-Two is unclear.

    From this point, the Mist's history is thought to be largely similar to his Earth-2 counterpart. A major difference is the time frame in which powers converted from invisibility to intangibility.  On Earth-2, this does not occur until at earliest the 1970's.  In the prior Earth-0 timeline, it appears to have begun in the 1940's.   Some casework on this earth is recorded that may or mat not be similar.  For example the Mist attempted to blackmail banker Sanderson Block into provided him with his next supply of money. To do this, he took Block's wife hostage and demanded a large sum of money. Block himself thwarted the Mist's plans however when he murdered his own wife to establish himself as the stronger of the two. The entire affair was witnessed by Starman who captured several of the Mist's cronies. The villain himself escaped and his capture has never been recorded (Starman 80-Page Giant #1).  Post-Crisis, The Mist attempted to take vengeance on David Knight while the elder Starman was in Limbo. At one point, he gained even greater powers and took the name "Nimbus", but the powers were short-lived and he was foiled by David Knight and Will Payton, each acting as Starman (Starman vol. 1 #26-27).