The Ace of Spades was a playing card. Pulling one out of a sleeve was a type of magic trick. (PROSE: Ghost Ship) The Tenth Doctor once hit an Ace of Spades dead centre with a dart. (PROSE: Forever Autumn)

A member of the Pageant was known as the Ace of Spades. (PROSE: The Man in the Velvet Mask)

When Madame Machine was drawing tarot cards for Nick Plainsong and Nate Silver, the card she drew for herself depicted "a three-pointed crown [...] impaled on a thrusted rapier." (PROSE: Newtons Sleep)