The Sixth Gun, Volume 8: Hell and High Water — Cullen Bunn

The Six--the cursed pistols that can destroy the world--have fallen into the wrong hands. Griselda the Grey Witch and her henchman Jesup Sutter now control the weapons. As they prepare to use the guns to throw open the gates of Perdition and condemn the world to darkness, they are opposed only by the ragtag group of of desperate heroes. But Drake Sinclair, Becky Montcrief, and Screaming Crow have a few surprises in store for the ageless witch. As the apocalypse dawns, a vicious gunfight rages in the streets of a nameless city.