Black Zero is the name of several entities in the Superman mythos. The original was a super-villain directly responsible for the destruction of the planet Krypton. The Black Zero Organization was a Kryptonian terrorist group. They also developed the Black Zero Virus, a program that plagued technology in the Fortress of Solitude. There was a Black Zero Unit as part of the Kryptonian Military Guild. The title is also associated with Kon-El. The first Kon-El Black Zero was an evil version from Hypertime. The second was the Kon-El of Earth 0, corrupted by Blackfire.
The name Black Zero was first used by Otto Binder in Superman #205. (1968)
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