Issue Detective 607
Subtitle The Mud Pack part four - The China Clay Syndrome 
Date undated
Writer(s) Alan Grant
Artist(s) Norm Breyfogle, Steve Mitchell
storyline Clayface 1 took the blood samples and forced a doctor to merge them and inject him with the composite. The experiment gave him Clayface 4's ability to shape-shift, and Clayface 3's lethal touch. Looker and Batman were able to stop "Ultimate Clayface" (or rather he burned down through the earth). 3 and 4 remained on the loose.