A supervillain or supervillainess is a variant of the villain character type, commonly found in comic books, action movies and science fiction in various media. They are sometimes used as foils to superheroes and other heroes. Whereas superheroes often wield fantastic powers, the supervillain possesses commensurate powers and abilities so that he can present a daunting challenge to the hero. Even without actual physical, mystical, superhuman or superalien powers, the supervillain often possesses a genius intellect that allows him to draft complex schemes or create fantastic devices. Another common trait is possession of considerable resources to help further his aims. Many supervillains share some typical characteristics of real world dictators, mobsters, and terrorists and often have aspirations of world domination or universal leadership. Superheroes and supervillains often mirror each other in their powers, abilities, or origins. In some cases, the only difference between the two is that the hero uses his extraordinary powers to help others, while the villain uses his powers for selfish, destructive or ruthless purposes.