This page contains a listing of all known appearances of Luthor Rex (Riddle of the Beast).
If you find an Issue this Character appears in that is not shown here, please edit that issue adding "Luthor Rex (Riddle of the Beast)" as a Cast member.
If you find an Issue this Character appears in that is not shown here, please edit that issue adding "Luthor Rex (Riddle of the Beast)" as a Cast member.
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