X-Men: Pryde of the X-Men the Sun for years, plunging the planet into another Ice Age, which would leave normal humans weakened, allowing the mutants to take over. The X-Men leave at once for Magneto's orbiting sanctuary Asteroid M, but the X-Men instruct Kitty to stay, as the mission is far too dangerous and she has not been trained. Kitty, however, wanting to prove her worth and make amends for her previous failure, phases aboard the Blackbird and hides, with the Professor's blessing. Upon reaching the asteroid, each X-Man quickly becomes engaged with an obstacle on the way to Magneto: Storm is needed to cover
Ultimate X-Men killing Beast, who was killed when a Sentinel attacked the White House during Emma Frost's public disclosure of her school. This made Beast the first dead Ultimate X-Man. As a side note, "Ultimate X-Men" #40 features what Marvel claims to be the first marriage proposal in a comic book letters column, which is answered in "Ultimate X-Men" #44 with a positive response. The third "Ultimate X-Men" writer was Brian K. Vaughan, best known at the time for his work on "". His run was marked by the relative absence of Wolverine as the main character and the re-imagining of second-string