File:X-Men Vol 1 12 001.JPG

Description
Cerebro detects the presence of an incredibly powerful being outside of the mansion, so the X-Men activate the mansion's defensive measures. The villain is able to break through line after line of defenses, so Professor Xavier informs his students of who the villain is so that they know what they will be fighting. Professor Xavier informs them that it is Cain Marko, his own stepbrother. Professor Xavier tells his X-Men the origin of their two families. After Professor Xavier's father was killed in an accident, Dr. Kurt Marko began courting Charles' mother, and eventually the two married. Sharon dies of a broken heart shortly into the marriage. One day Charles overhears Cain and Dr. Marko talking about inheriting the family fortune. Charles interrupts and a fight breaks out. A fire starts but Dr. Marko is able to get both boys out of harms way, but he dies from smoke and fume inhalation. Years later, Cain and Charles both joined the army and served together in Korea. After a fire fight, the two stepbrother stumbled upon the Temple of Cyttorak. Cain finds a ruby in the center of the cave that tranforms him into a human juggernaut. A bomb causes the cave to crumble, but Charles is able to get out just in time. Back in the present, Juggernaut breaks down the doors to the mansion and easily defeats the X-Men. Nothing stands in his way of Professor Xavier anymore.