List of Justice League enemies

This is a list of fictional characters from DC Comics who are or have been enemies of the Justice League. In chronological order (with issue and date of first appearance).

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. Inevitably, John Stewart was able to use his power ring and the Construct to contain the weapon's consciousness in his ring. 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. However, it would later merge with the soul of Enigma's deceased daughter in S.P.H.E.R.E. to become a force for good on the Anti-Matter Earth.

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