Amos Fortune is an old enemy of the Justice League. He is an evil scientist, but unlike others that specialize in sort of "traditional" abominations of science (machines, monsters, time travel, cloning, diseases, etc), Fortune studies and uses luck in his schemes.

Fortune used to run a gang when he was younger, but upon growing up, he found himself fascinated (and obsessed) with luck. He eventually theorized that human beings have "luck glands" that focus "stellaration" or "luck magics" from the stars. These supposedly determine how lucky or unlucky they'll be in life. With this information he went on to using these "luck glands" to manipulate luck in order to commit crimes. Despite this, he is still generally unsuccessful.

He is the founder of the first Royal Flush Gang and the Luck League.