The source of all Darkness, the King of Darkness, and the Darkness of Shadow itself. He possesses the ability called Light of Darkness. He creates a domain and rules over it. The domain expands infinitely... And as it does, Dark Zerion grows larger as well. In theory, he can grow to an infinite size. He can increase his power by absorbing light. His weakness is the core located inside his sternum. If the core is destroyed, he vanishes. Every form of Darkness in this world symbolizes a negative concept. He rarely steps onto the front lines himself. Instead, he sends other forms of Darkness to the battlefield.