how Magneto Lost His Powers | X-Men: The Last Stand Ending explained. What happens when the most powerful mutant alive loses everything? In X-Men: The Last Stand (2006), Magneto leads an army to wipe out the mutant cure—but in a shocking twist, the cure is used on him instead. The unstoppable master of metal is reduced to a helpless man, and Jean Grey’s Phoenix Force unleashes destruction like never before. Here’s the full breakdown of the final battle on Alcatraz Island, Magneto’s tragic downfa