The Eradicator is the given name of four different fictional comic book characters, appearing in books published by DC Comics. The first iteration was an antihero character appearing in the Flash series of comics. The second was a superhero (and sometimes supervillain) having a recurring role in Superman stories, and the remaining two first appeared in 2013 and 2017, respectively.
The first Superman Eradicator was originally created as a weapon by the Kryptonians over 200,000 years ago. The Flash Eradicator was created by Carmine Infantino and Cary Bates and first appeared in The Flash #314. The first Superman character was created by writer Roger Stern, and first appeared in Action Comics Annual #2 (1989).