The Dreaming #17 DC Comics (1996)

The Corinthian is supposed to be a nightmare. He's not supposed to have bad dreams, but a strange link has formed between the toothily charming new Corinthian and Gabriel, a delusional victim of an older version of the Corinthian. Gabriel believes that he is truly the Corinthian, and his warped reality is affecting the Dreaming.

Former victim of Corinthian starts believing he is the Corinthian.