Wild Bill Hickok's Playing Cards

Origin
James Butler Hickok (May 27, 1837 – August 2, 1876)—known as "Wild Bill" Hickok—was a folk character of the American Old West. Some of his exploits as reported at the time were fictionalized, but his skills as a gunfighter and gambler provided the basis for his enduring fame, along with his reputation as a lawman. He went west at age 18 as a fugitive from justice, first working as a stagecoach driver, then as a lawman in the frontier territories of Kansas and Nebraska. He fought (and spied) for the Union Army during the American Civil War, and gained publicity after the war as a scout, marksman, actor, and professional gambler.

He was shot from behind and killed while playing poker in a saloon in Deadwood, Dakota Territory (now South Dakota) by an unsuccessful gambler, Jack McCall. The card hand that he held at the time of his death (aces and eights) has come to be known as the "Dead Man's Hand".

Effects
Gives user incredible firearm skills. If pair of aces and a pair of eights, all black are held, the user will die by gunshot.