In a land beyond God's reckonin' is a place called the Forgotten West — a cursed land of sorts in the American frontier, housing the damned, the mysterious, the unfortunate. You ended up there, God knows why, and you sure ain't leavin' anytime soon.
The Iron Witch, a downright mysterious bein', has turned you into a Grimslinger, a powerful witch imbued with metal, machine, and fancy elemental powers. Now yer maker's requirin' all his newly sired to duel each other so that he can make y'all into witches proper for his own purposes.
This is an expansion and requires the Grimslingers base game in order to be playable.