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,
Captain Marvel (DC Comics) Mary Marvel appeared together as a team in another Fawcett publication, "The Marvel Family". In addition, there was a funny animal spin-off character, Hoppy the Marvel Bunny, which was created in 1942 for Fawcett's "Funny Animals" comic book and later given an eponymous series as well. With Bill Parker having been drafted into World War II, chief writing duties on the Captain Marvel-related comics stories went to Otto Binder by 1942. C.C. Beck remained as lead artist, and he and Binder steered the Captain Marvel stories towards a whimsical tone that emphasized comedy and fantasy elements alongside the superhero action.