The Uncanny X-Men

Norman Osborn's Dark Reign comes to San Francisco. Anti-mutant riots erupt. Osborn creates his own Dark X-Men with Emma Frost and Namor as double agents. Cyclops raises Asteroid M from the ocean floor and declares it Utopia — a sovereign mutant nation. Read this for the setting. Utopia defines the X-Men's status quo through Second Coming and Schism