X-Men: Phoenix - Warsong #1

In "Phoenix: Warsong Part One," the Stepford Cuckoos answer the siren call of the Phoenix Force, their minds overtaken despite the X-Men and Sentinel Squad One’s desperate attempts to stop them. As the sisters vanish into the sky, the graves of two fallen Cuckoos begin to stir. Written by Greg Pak and illustrated by Tyler Kirkham, with inks by Sal Regla, colors by John Starr, and letters by Troy Peteri, this pivotal issue features a striking cover by Marc Silvestri and Joe Weems.