Jack Power (Marvel Comics) Jack Power (Marvel Comics) Jack Power, currently known as Mass Master, formerly Counterweight and Destroyer, is a fictional character appearing in American comic books published by Marvel Comics. He first appeared in "Power Pack" No. 1 and was created by Louise Simonson and June Brigman. Jack was a founding member of the superhero team Power Pack. The second youngest of the four Power siblings, he was 8 1/2 years old when he was given his powers by Aelfyre Whitemane, a dying Kymellian noble. He continued to operate with Power Pack through their entire history. Jack Power was born in Richmond,
Marvel Mystery Comics Marvel Mystery Comics Marvel Mystery Comics (first issue titled simply Marvel Comics) is an American comic book series published during the 1930s–1940s period known to fans and historians as the Golden Age of Comic Books. It was the first publication of Marvel Comics' predecessor, Timely Comics, a division of Timely Publications. In 1939, pulp-magazine publisher Martin Goodman expanded into the newly emerging comic book field by buying content from comics packager Funnies, Inc. His first effort, "Marvel Comics" #1 (cover-dated Oct. 1939), from his company Timely Publications, featured the first appearances of writer-artist Carl Burgos' android superhero, the Human Torch,