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Intro He was one of the Astral Mother's creations, known at the time as William. He enjoyed the company of others, but sometimes his mother forced him to come for experiments. One day, another Sans, called Infected, came to destroy the AU. He and his brother Adam fought it. When Infected killed his brother, he was filled with rage and sadness. He opened a rift to go into an anti-void called the Mainframe. As soon as he entered it, he took ownership of this anti-void and absorbed part of its code, making it more powerful. He teleported Infected into the Mainframe, and, thanks to the anti's special trait