History
Magneto united all mutants under one nation in Santo Marco and used them to attack the United Nations, until Juggernaut (Charles Xavier) arrived and crushed his helmet. Magento fled this defeat to Asteroid M and spent 20 years developing a tool to allow its wearer to be shielded from Xavier's thoughts. He met Cain Marko and the paired conspired together on how to defeat the Juggernaut. When several of the X-Men quit the team, Marko saw his chance. He met with the former X-Men and helped convince them to aid Magneto against Xavier. The former X-Men led Xavier to Magneto's asteroid base, where he was launched into space.[1]