That shade possessed Ginny Weasley after Lucius Malfoy had slipped the diary into her cauldron during a confrontation at Flourish and Blotts, as part of his plan to discredit her father, Arthur Weasley. The Writing on the Wall, an indication that the Chamber of Secrets had been opened once againįifty years after Riddle's original attack on Hogwarts, the Basilisk was re-awakened by a shade of Riddle that was generated by a Horcrux that he had housed in his old diary. ENEMIES OF THE HEIR, BEWARE." - The Writing on the Wall " THE CHAMBER OF SECRETS HAS BEEN OPENED. However, Riddle, who did not want his five years of hard work in finding out about the Chamber to go waste, left behind a Diary, which he had purchased that same year, and contained a portion of his own Soul, in the hope that one day, it would allow him to, through possession of an unwitting host, reopen the Chamber and reawaken the Basilisk. Dumbledore also convinced Armando Dippet, who was the Headmaster at that time, to allow Hagrid to stay at Hogwarts as Gamekeeper. However, Transfiguration Professor, Albus Dumbledore became suspicious of Riddle, kept a very close watch over him during his remaining years at Hogwarts, and thus prevented him from any further terror at the school, since Riddle feared discovery. Hagrid was expelled, and the attacks stopped. To avoid that undesirable consequence for Hogwarts, which was the closest thing that he had to a home, Riddle framed Gryffindor Third year, Rubeus Hagrid for all the events, and claimed that Hagrid's pet Acromantula, Aragog, was responsible for the attacks. Those events were nearly the cause for the permanent closing of Hogwarts. A sink in that bathroom concealed the Entrance to the Chamber of Secrets. All the victims were merely Petrified, except for a student named Myrtle Warren, who was killed in the Girls' Bathroom on the Second Floor.
Riddle unleashed the Basilisk on the school, with his goal of ridding the school of all of its Muggle-borns. In 1943, the Chamber of Secrets was opened by a Slytherin Fifth year, named Tom Riddle, who was able to control the Basilisk through his status as the Heir of Slytherin. Slytherin's Basilisk slithering through the Chamber of Secrets " But I know one thing - last time the Chamber of Secrets was opened, a Mudblood died." - Draco Malfoy regarding the first opening