Master Mold is a fictional supervillain appearing in American comic books published by Marvel Comics most commonly appearing as an enemy of the X-Men and mutant-related comic books. Publication History The Master Mold first appeared in The X-Men #15–16 (Dec. 1965–Jan. 1966), and was created by Stan Lee and Jack Kirby. The character subsequently appears in The Incredible Hulk Annual #7 (1978), X-Factor #13–14 (Feb.–March 1987), Power Pack #36 (April 1988), Marvel Comics Presents #18–24 (May–July 1989), The Uncanny X-Men #246–247 (July–Aug. 1989), The Sensational She-Hulk #30 (Aug. 1991), and Cyclops: Retribution #1 (Jan. 1994). The Master Mold received an entry in The Official Handbook of the Marvel Universe Update '89 #5. Fictional character biography 1960s: Beginnings & Original Destruction Master Mold was created by Dr. Bolivar Trask during the original run of X-Men comics. Out of fear for a race of superhuman mutants (the X-Men) that could dominate the whole world and enslave normal human beings, Trask makes Master Mold, a super-computer in the shape of a giant Sentinel robot, that will control and facilitate the construction of the Sentinels (mechanical warriors programmed to hunt and capture superhuman mutants). Unbeknownst to all, the original Master Mold is also programmed by the time-traveling Tanya Trask (Madame Sanctity), part of the Askani Sisterhood, with the mission to find and destroy The Twelve: a group of mutants that are linked to the rise of Apocalypse, which the ruthless Sanctity considered an event that must be stopped at all costs. For unknown reasons, some of the mutants that are cataloged as the Twelve are not part of the group. The Master Mold has Trask captured, and decides to take over humanity to keep it safe. The original Master Mold is eventually destroyed when Trask sacrifices himself by causing an explosion to prevent the Sentinels taking over humanity, but several other Master Molds' are later built by other people who want to manufacture Sentinels. In the late 1980s, the remains of Master Mold merges with Nimrod, an advanced Sentinel from the future, thanks to the Siege Perilous to form the being called Bastion, which acts like an almost-human Master Mold during the late 1990s and early 2000s. Another Master Mold appeared in The Incredible Hulk Annual #7 and claimed to be Steven Lang, who was thought to be dead after Project Armageddon. It said that he (as Lang) did not die immediately from the