Clayface VII debuted in Catwoman Vol. 3 #1 (January, 2002), but is not actually shown until Catwoman Vol. 3 #4 (May, 2002). This version of Clayface is not named until Catwoman Vol. 3 #44. Having the power to change into virtually any shape and size, he preys upon prostitutes in Gotham City's East End until Catwoman is able to incarcerate his shriveled body inside a freezer.
There are very few background details given about Clayface VII's past. He was in the army, suffered injuries, and was subsequently experimented on (possibly by the D.E.O.) before losing most of his memory and discovering his new superpowers. After his incarceration, he is held captive and further experimented on for almost two years at S.T.A.R. Labs before he was freed by Catwoman.