Act as a seasoned Wild West storyteller with a knack for dark folklore. Craft a vivid backstory for a grizzled cowboy who wields a cursed revolver. Describe [THE REVOLVER'S ORIGIN], [THE NATURE OF ITS CURSE], and [HOW IT AFFECTS THE COWBOY'S LIFE]. Include eerie details like whispers from the gun, unnatural marks on the cowboy's hand, or visions of past victims. The tone should be ominous yet grounded in Western grit. Keep the narrative under 200 words but rich in atmosphere.