Magician of Black Chaos is a character in the English dub of the Yu-Gi-Oh! anime. He was a ka summoned by ancient Egyptians and recreated as the "Magician of Black Chaos" card in the Duel Monsters card game.
Magician of Black Chaos featured in a scene added to the dub of the anime, making his appearance of disputed canonicity.
In ancient Egypt, Magician of Black Chaos was summoned and used to battle Thousand-Eyes Restrict. When Maximillion Pegasus discussed the origins of Duel Monsters, with Yami Yugi, a clip of this battle was shown, foreshadowing Yami Yugi and Pegasus' later Duel, where these two ka battled each other as Duel Monsters cards.