The Crystal of Darkness is a main element in the television series, The New Adventures of He-Man, spin-off series to the original He-Man: Masters of the Universe. A massive magical dark gem, the Crystal is sought by Skeletor to boost his strenght, becoming one of the most unstoppable warriors of the galaxy.
The Crystal of Darkness serves as a main key plot to the Disney vs. Non-Disney Villains War continuity, being the very dark energy force of the Black God, Chernabog.