Djinn (Final Fantasy)

"Fuhahaha... That thing won't work on me now. I've allied with the great power of Darkness!"

- Djinn NES Translation

Djinn is a boss from the video game Final Fantasy III. He lerks inside the Sealed Cave, and his only known weakness is a metal known as Mythril. Princess Sara helps the Warriors of light fight the Djinn, and once defeated the people he turned to ghosts return to normal.