. "1968"^^ . . . . . . . "June"@en . "y"@en . "Legion of Super-Heroes"@en . . "Mordru the Merciless"@en . "1968"^^ . . . . . . . . . "\"Mordru the Merciless\" is a story arc that was published by DC Comics, and was presented in Adventure Comics #369-370 (June\u2013July 1968). It was written by Jim Shooter, pencilled by Curt Swan and inked by Jack Abel. The story arc features the first appearance of Mordru, arguably the most powerful enemy of the Legion of Super-Heroes."@en . . . "Adventure Comics #369-370"@en . "y"@en . . "y"@en . . "\"Mordru the Merciless\" is a story arc that was published by DC Comics, and was presented in Adventure Comics #369-370 (June\u2013July 1968). It was written by Jim Shooter, pencilled by Curt Swan and inked by Jack Abel. The story arc features the first appearance of Mordru, arguably the most powerful enemy of the Legion of Super-Heroes."@en . . . . "Mordru the Merciless"@en . . . "July"@en .