Karathun is a virus Deron has created to replace Stevonia's Yottabyte.


The code for the virus is located on a slip of paper taped onto Invincible's fuel tank. Deron built a special ship, called the K-Launcher, which launched Karathun at rUBY when Derek gave the command. The Karathun was launched is codenamed "RDF-Day" (rUBY DownFall Day).

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