Mass Master

A young Marvel hero who made their debut in 1990 courtesy of creators Terry Austin and Ernie Colón, Mass Master is a Copper Age arrival whose adventures have unfolded across an impressive two-decade-plus span. With a catalog presence rooted in Power Pack — one of Marvel's most beloved family-friendly series — this character keeps genuinely exciting company, sharing pages with the likes of Alex Power, Franklin Richards, and Tandy Bowen. Small in total catalog appearances but connected to some of Marvel's most enduring corners, Mass Master is a rewarding discovery for any collector digging into the rich, inventive era that bridged the late Bronze Age into the Modern Marvel universe.