The Riddler is a DC Universe supervillain and an enemy of the Batman. In 2009, he was ranked as the 59th Greatest Comic Book villain of all time. The Riddler is obsessed with puzzles, riddles and word games. He enjoys forewarning Batman about the crimes that he plans to commit in a complex cipher. He is depicted wearing a domino mask with a green suit and a bowler hat. He is portrayed as a smooth talking yet a quirky character. Just like the Joker leaving joker playing cards at crime-scenes, the Riddler leaves a Question Mark.
In the antimatter DC Universe, the Riddler assumes the form of X in the Secret Society of SuperVillains . X is considered to be the smartest man alive. Eventhough he doesnot have superpowers, his IQ and knowledge of almost all the disciplines enabled X to be an effective fighter.
Identify X.