Crucifix
From Tardis Wiki, the free Doctor Who reference
In mythology, vampires feared crucifixes. However, in the case of the Haemovores, they were not afraid of the object itself, rather the faith of people who carried them. (TV: The Curse of Fenric)
H. G. Wells, mistaking the Sixth Doctor to be a spirit, attempted to hold up a crucifix, along with a Bible, to repel him. (TV: Timelash)
