D’Spayre attacks the team, making them see ghosts and other scary stuff. So Chamber blows him up. Chamber blows up, too–his powers go a little haywire–but in this issue we learn that he can disperse his own atoms, and re-form. He tries to keep his mouth re-formed, but can’t.
Apparently, there was a Generation X novel–and this story is an adaptation of it. Yes, there is a comic book adaptation of a book that was based on a comic.