Onslaught (X-Men/Avengers, Volume 3)

The truth about Onslaught's origin has already struck at the very heart of the X-Men. Now, the evolving and all-powerful villain assaults New York City with robotic Sentinels - and prepares his genocidal endgame! As an army of Earth's heroes amasses, will the Avengers and Fantastic Four make the ultimate sacrifice to save the planet? When the dust settles, who will remain standing to fight another day? And what does the future hold for a guilt-stricken Charles Xavier?