Pin

It was said that a legion of angels could dance on the head of a pin. (PROSE: The Equations of Dr Who)

Miss Garglespike's World of Pins, in Sardicktown, exhibited what was advertised as "the largest collection of antique and decorative pins in the Horsehead Nebula". (PROSE: Honeymoon Horrors) Indeed, Miss Garglespike herself was an advanced practitioner of acumancy, "pin magic". She wore a veritable armour of pins on her jacket, and most of her decorative pins could be un-shrunken to turn into various magical weapons. Others among her pins were trophies from people she had killed, including a cat-shaped pin belonging to the President Kodachrome. (PROSE: The Bloodletters) The Sixth Doctor wore a similar pin. (TV: The Twin Dilemma)