Uncanny X-Men #500

In the Port of Oakland, a controversial artist known as Guy DeMondue picks up a cargo that will be utilized as the centerpiece of his newest art installation: three decommisioned Sentinel units! DeMondue even enlists the aid of Simon Trask, hiring him to inspect the robots. In the outskirts of San Francisco, the X-Men are beginning to settle down in their new headquarters and even offer Sadie, the city's mayor, a brief tour of the premises. However, the team is shocked to find out, through Sadie, about Guy's art exhibition, the concept of which they find garish and even appalling. Subsequently, the team attends to the exhibiton, where they easily fit in with rest of the attendants, most of them playfully dressed up as members of the X-Men, paying tribute to the "mutant kitsche" theme of Guy's art installation. Things take a turn for the worse, though, when an apparently repowered Magneto suddenly appears and activates the Sentinels.

In the ensuing fight, the X-Men manage to take down the robots, while Magneto is revealed to be faking his powers thanks the specially-designed costume he dons. Magneto even vanishes. Belatedly, the team realizes that Magneto served as a distraction for the High Evolutionary to do something unknown to the Dreaming Celestial that towers over Golden Gate Park. Later, Magneto and the High Evolutionary discuss their plans in a spacecraft floating in outer space. A few days later, Cyclops, his message telepathically trasmitted by White Queen to every corner of the planet, invites every remaining mutant to join them in their new mutant sanctuary. Wolverine later goes to visit Guy DeMondue, hoping to extract some answers from him, only to find the artist murdered. A few weeks later, Pixie and a friend of hers exit a nightclub, unaware that they are being stalked by a team of mutant-haters who don the helmets of the Hellfire Club soldiers but call themselves "the Hellfire Cult."