"Beware the Blood Brothers!" First appearance of Thanos. Story by Jim Starlin. Art by Jim Starlin and Mike Esposito. Cover by Jim Starlin and Joe Sinnott. One of the landmark Marvel issues of the Bronze Age. Drax the Destroyer is a prisoner of Thanos at the evil Titan's Earth-fortress. In an effort to escape, Drax telepathically reaches out to Tony Stark for assistance; but before Iron Man can come to the rescue, Shell-Head is ambushed by the Blood Brothers! Can Drax and the golden avenger defeat the Blood Brothers and Thanos? Also first appearances of Drax the Destroyer, Starfox (in a flashback), and Mentor.