John Dee/Doctor Destiny is an evil mad scientist who acts as a super-villain and enemy to the Justice League. Originally a simple genius who invented gadgets to commit crime, his career changed forever when he created the Materioptikon. This device allows him to warp reality based on the fabric of dreams, making him unimaginably powerful. Doctor Destiny was created by Gardner Fox and Mike Sekowsky, first appearing in Justice League of America #5 (1961).