Hermann Rorschach's 10 Cards

Origin
Hermann Rorschach (November 8, 1884-April 1,1922) was a Swiss Freudian psychiatrist and psychoanalyst, best known for developing a projective test known as the Rorschach inkblot test. This test was reportedly designed to reflect unconscious parts of the personality that "project" onto the stimuli. In the test, individuals are shown 10 inkblots—one at a time—and asked to report what objects or figures they see in each of them.

Effect
The 10 cards were the first ones used by Rorschach to test his patients. When all 10 are stared at, in order, the user will be cured of any mental illness.