Mark Mardon - a less than altruistic criminal who ignored the untimely
death of his scientist brother to steal a rod that can control the weather
| Issue | Comment | Reprinted in |
| Flash #110 | vs The Flash | 80-Page Giant #4, Flash Archives (SA) #2 |
| Flash #130 | vs. Kid Flash and the Elongated Man | Four Star Spectacular #2 |
| Flash #145 | vs the Flash | Flash #214 |
| Detective #353 | vs. Batman and Robin | |
| Flash #222 | w/ Sinestro, vs the Flash and Green Lantern | |
| Flash #213 | w/ Rogue's Gallery, vs The Flash | |
| Flash #243-44 | w/ Rogues Gallery, vs the Flash | |
| Adventure #450 | vs. Aquaman | |
| Flash #254 | vs. The Flash | |
| Adventure #466 | vs. The Flash | |
| Flash #300 | ||
| Flash #350 | ||
| Crisis on Infinite Earths #5 |