This is a list of fictional characters from DC Comics who are or have been enemies of the Justice League.
One of Roval's underlings learned from the heroes of who the Crime Syndicate was and the weapon was turned on the Anti-Matter Earth.
They were equally unable to stop the weapon and asked the League for help, which was granted.
The weapon's mind proved too much in time and began to take over Stewart and transform him into a cybernetic host.
In its new form, it became a servant to Krona and laid waste to entire galaxies for him.