Peter Parker, the Spectacular Spider-Man #030 (1979)
“Secret as the Grave!”
Writer: Bill Mantlo
Artist: Jim Mooney
Spider-Man and Carrion fight some more. Carrion drugs him with some kind of dust and takes him to Professor Warren’s lab where he straps him to a table and prepares for the final stage of his revenge. He reveals that he is the living clone of Professor Warren.