Detective Comics #607

In "The Mud Pack, Part Four: The China Clay Syndrome," Batman is in peril as Karlo, driven by obsession, forces Doctor Lowell to merge stolen blood samples from Payne and Fuller—each a victim of the same monstrous transformation—into a new, terrifying form of Clayface. Meanwhile, the fugitive Payne and Fuller, separated from the chaos, begin to confront unexpected emotions between them. Written by Alan Grant and illustrated with gritty precision by Norm Breyfogle—whose cover pencils and inks capture the issue’s raw intensity—this 1989 installment deepens the mystery of identity and mutation in Gotham’s shadowed streets.