Djinn (Wishmaster)

Djinn is an ancient, evil demon known as a djinn and is the central antagonist of the Wishmaster horror movie series - although a hideous monster in his true form he is an adept shape-shifter and manipulator who wishes to free he fellow djinn and end the world: however in order to do so he must grant three wishes to the person who freed him - unlike most other evil genies in popular culture however the Djinn can grant infinite wishes to people who didn't set him free and is a sadistic villain who greatly enjoys making people wish things and warping them into gruesome and nightmarish scenarios.

The Djinn is one of the more powerful villains in horror, at least as powerful as Freddy Krueger and Pinhead - if not more so - his vast array of powers serving to make him a formidable opponent to any who would stand in his way.