Quasar #12 was published by Marvel Comics on July 1, 1990, as part of a series that began in 1989. Mark Gruenwald writes, and art comes from Fred Fredericks, George Roussos and Keith Williams. This 36-page issue features Wonder Man, Moondragon, Quasar, Makkari and Willie Lumpkin, among 14 characters cataloged on VerseDB.