Bio: Mordern piloted Rog the Terrible Titan for the Brotherhood of Evil, but they subsequently forgot about him. After three days in an irradiated isolation tank, he emerged as a black blip.
At least this is his version of the story. After wounding him, Yankee Doodle Dandy ripped off his mask to reveal the face of Mr. Mordern. Cliff Steele placed the weakened Mordern back inside the Painting That Ate Paris, where the other members of the Brotherhood had previously disappeared.