X-Men: Phoenix - Warsong #4

In "Phoenix: Warsong Part Four," Celeste battles the Phoenix force within her, seeking control as the X-Men race against time to stop her. With Kitty uncovering a hidden Weapon Plus machine fueled by Cuckoo clones designed to harness the Phoenix’s power for mutant genocide, Emma attempts to reach her cloned daughters through a bio chamber—only to find the Phoenix’s might overwhelming. As all three Cuckoo sisters fall under the Phoenix’s influence, the deadly machine begins to awaken. Written by Greg Pak and illustrated by Tyler Kirkham, with inks by Sal Regla and Jay Leisten, colors by John Starr, and letters by Troy Peteri, the issue’s cover by Marc Silvestri and Joe Weems captures the escalating tension.