Malekith the Accursed (Marvel)

Malekith the Accursed is a Dark Elf from the Realm of Svatalheim, and an enemy of Thor. He is a powerful sorcerer and controls a pack of supernatural wolves. Half of his body is black, while the other half is bluish-white.

History
Malekith the Accursed is the ruler of the Dark Elves. He is one of the Nine Worlds of Asgardian cosmology. The Dark Elves are also known as the Faerie of Celtic mythology and of Arthurian legend. The principal nexus between Earth and Svartalfheim lies beneath a palace (that is now in ruins) in the Cotswolds of Britain.

Avengers: Earth's Mightiest Heroes
Malekith appeared in the TV show, Avengers: Earth's Mightiest Heroes. After being raised from the dead by Loki, he sought the Casket of Ancient Winters, a relic that had the power to cover the whole earth in ice. He was supposed to return it Loki, but betrayed him and took it for himself, unleashing it's power across the world. He was eventually defeated by Thor, Iron Man, and the Black Panther, and the Casket was taken by The Enchantress.

Thor: The Dark World
Christopher Eccleston played Malekith as the main antagonist in Thor: The Dark World.