I found the Joker figure from the Superman Batman Vengeance 2 line loose (unfortunately without Mr. Mxyzptlk) and thought the lanky, suit-wearing body would be a decent base for a Riddler. The Elongated Man head looks very Riddler-esque to me, but the head attaches very differently, so I grafted the neck from an X-Files Fox Mulder figure and lengthened it slightly with epoxy putty. I sculpted on the mask and the question mark insignia on the tie and on the back of his jacket. I wanted the question mark on the back to have a stylised "shattered" look to it. The question mark cane was made from a straw, some twisty wire and epoxy sculpt. Thanks for looking!