The Toymaker's gold tooth
From Tardis Wiki, the free Doctor Who reference
A single gold tooth belonged to the Toymaker.
An unspecified male incarnation of the Master on the verge of death lost a game with the Toymaker in a desperate attempt to extend his life; as his prize, the Toymaker imprisoned the Master in his gold tooth.
After the Fourteenth and Fifteenth Doctor defeated the Toymaker in a game of catch atop UNIT Tower and banished him from existence, the only part of the Toymaker's body to remain in its original three-dimensional form was his gold tooth. A mysterious hand with red fingernails later retrieved the tooth. (TV: The Giggle [+]Loading...["The Giggle (TV story)"])