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Alien creature who operated through various "surrogates" in numerous conflicts with the Justice League prior to his destruction.
Justice League of America (1960) #235
View a chronological listing of this character's appearances
Crisis on Infinite Earths (1985)
- 'War Zone'
Justice League America (1989)
- 'The Trouble with Guys'
- 'Absolute Power'
- 'They Might Be Giants'
- 'Shadow of Death'
Justice League International (1993)
- 'Judgement Day, Part 3: A Whole New Ballgame'
- 'Judgement Day, Part 6: All Out of Time'
Justice League of America (1960)
- 'Gang War'
- 'Heavy Metal'
- 'Gypsy Genius'
Justice League Task Force (1993)
- 'Judgement Day, Part 2: Split Decision'
- 'Judgement Day, Part 5: The Longest Yard'
- 'The Enemies Among Us, Part 5'
The DC Comics Encyclopedia (2004)
- 'The DC Comics Encyclopedia: Updated And Expanded'
- 'The DC Comics Encyclopedia'
Who's Who: The Definitive Directory of the DC Universe (1985)
- 'Cadre to Chris KL-99'
Cadre (DC)(01 - Original Team)
Cadre (DC)(02 - Judgment Day)
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