The article presents the “psychoanalytical playing” method used as part of a project inspired by psychoanalysis set in place by the writer collaborating with the contemporary artist Patrick Corillon, for the purpose of clarifying the process of artistic creation in the artist’s work. This method is based on the Winnicottian view of the psychoanalytical session as play, occurring in the overlap of two potential spaces of playing. While it is a part of the artist’s creative process, “psychoanalytical playing” has certain features in common with conventional psychoanalysis, although it also differs in many other respects. The material provided by this methodological device, along with a study of Patrick Corillon’s work, led the author to advance the hypothesis of a fantasy of immortality operating as the “driving force” of the artist’s creative process, and to detect the traces of an unconscious immortal Ego, as formulated by André Green in his book Life Narcissism Death Narcissism (2001).