The X-Men are off to protect the Earth from its destruction at the hands of the Breakworld...and when it's all over; nothing will ever be the same! No; really; we mean it! Whedon and Cassaday prove they are more than Astonishing: They are unstoppable! Collects Astonishing X-Men (2004) #19-24 & Giant-Size Astonishing X-Men #1.