T. M. Riddle's Diary was a blank diary which Tom Riddle transformed into a Horcrux. This event took place in 1943, during Riddle's sixth year at Hogwarts School of Witchcraft and Wizardry, and it was the first Horcrux he ever made. Before Lord Voldemort's first defeat in 1981, the diary was passed to Death Eater, Lucius Malfoy, who kept the diary, in secret, before he slipped it into Ginny Weasley's cauldron of school supplies at Flourish and Blotts in 1992. The diary used its magical influence to possess and force Ginny to re-open the Chamber of Secrets, but it was destroyed by Harry Potter in 1993 with a Basilisk's Fang.