The chart-topping super-team of Joss Whedon (TV's Buffy The Vampire Slayer, Runaways) and John Cassaday (Planetary, Captain America) return for more Astonishing X-Men! If you thought their past efforts were full of shocks and surprises, hold onto your eyeballs because you haven't seen anything yet! Things go from peculiar to just plain bizarre as Emma Frost's erratic behavior sends the X-Men spinning in a nonstop downward spiral. Will an unlikely union be the final straw? After secretly lying in wait for months, the new Hellfire Club makes its move! Plus: The X-Man destined to destroy the Breakworld stands revealed! Who is it, and what will be their fate? And will the X-Men be able to protect Earth from certain destruction at the hands of the Breakworld? When it's all over, nothing will ever be the same! No, really, we mean it!