From Batman Forever (1995) is a neat piece it's the chess pieces riddle that the Riddler attached to the main gates of Wayne Manor that Brue Wayne must decode in order to find out who the Riddler is. With the help of Alfred, he figures out that each of the riddles contains a number that corresponds to a letter in the alphabet and eventually they come up with "Mr E" or "Mystery" put together and another word for mystery is "Enigma", Mr E Nigma... "Edward Nygma" the Riddler.
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I'm always on the hunt for Riddler items, feel free to leave a comment or check out my other items :)