As a young man, Matthew Masters was known as the
Cactus Kid, an outlaw. His criminal career ended one day at the Last Chance Saloon in Jefferson County,
Texas, when he faced the David Gang, who had taken the town hostage. When the dust cleared, the killers were dead, and the Cactus Kid was summoned to the mansion of the governor of Texas. The governor pardoned the young outlaw as a reward for getting rid of the Davis Gang, and the Cactus Kid promised to go to medical school and become a doctor. Years later, "Doc" Masters became the new physician for the small town of Leadville, Texas. Masters' new peaceful lifestyle left him unwilling to use violence when a hired killer came to town, and he was branded a coward by the townspeople. Masters decided to disguise himself as the Black Rider, so that he could fight criminals without revealing his criminal past to the town.He began to romance the beautiful but venomous blonde rancher Marie Lathrop (who despised Doc Masters, but loved the Black Rider), and helped her father Jim Lathrop Later, the Black Rider identity was discovered by the young Bobby Lathrop, who became his ally and confident. The Black Rider's adventures happened from before 1870 until 1877. He began cleaning Leadville of outlaws, and then he expanded his actions all across the West, acting as
medic of the frontier, becoming very famous acrros the land. In one his travels, Masters pretended to be an engineer called
Oswald Garry and romanced a spunky rancher named Barbara Kane, impressing her, mastering her with a lash and promising her marriage. Sometime, in middle of one of his adventures, the Black Rider investigated a crime in Texas that leads him to
New York City's
Chinatown. There he receives help from a mysterious Chinese man, who is eventually revealed to be a younger version of the
Ancient One, future mentor of the occult
superhero Doctor Strange. Much later in his hero career, in 1880, Masters found a dying Masked Rider, Jim Gardley, who was shot by unknown assailants. When Masters tried to assist him and retired the mask from his face, Gardley suddenly died. Masters took the Eternity Mask and decides to search for the killers. Later in life, at his 80s, Masters gives the mask to the young hero Dennis Piper, The Ferret. ==Brazilian continuation==