Basilisk

The Basilisk, also called the Serpent of Slytherin, is the ancient and deadly creature that lurks within the Chamber of Secrets at Hogwarts School of Witchcraft and Wizardry. It is the instrument through which the Heir of Slytherin attempts to purge the school of all Muggle-born students, and its attacks—which leave victims Petrified rather than dead—form the central mystery of the second year at Hogwarts. The Basilisk is not merely a monster but a symbol of pure-blood supremacy and the return of a dark history that the school has tried to bury.

Origins and Nature

The Basilisk is described in a page torn from an old library book, which Hermione Granger clutches in her hand when she is Petrified. According to this text, the Basilisk is "the King of Serpents," a snake that "may reach gigantic size and live many hundreds of years." It is born from a chicken's egg hatched beneath a toad, an unnatural origin that marks it as a perversion of natural processes. Its methods of killing are "most wondrous," for aside from its "deadly and venomous fangs," the Basilisk has a "murderous stare," and all who are fixed with the beam of its eye suffer instant death. However, the text also reveals its vulnerabilities: spiders flee before the Basilisk, for it is their mortal enemy, and the Basilisk flees only from the crowing of the rooster, which is fatal to it. This information becomes crucial to Harry Potter and Ron Weasley as they piece together the nature of the monster.

The Basilisk is also tied to Salazar Slytherin, one of the four founders of Hogwarts. According to the legend recounted by Professor Binns, Slytherin built a hidden chamber in the castle and sealed it so that none could open it until his own true heir arrived. The heir alone would be able to unseal the Chamber and unleash the horror within—the Basilisk—to purge the school of all who were unworthy to study magic. The creature is thus not just a beast but a weapon of ideological cleansing, embodying Slytherin's belief that magical learning should be kept within all-magic families.

The Attacks and the Mystery

The Basilisk's presence is first hinted at when Harry hears a disembodied voice in the corridors, a voice that no one else can hear. He hears it in Lockhart's office, at the Deathday Party, and again on the second floor, where he finds the message "THE CHAMBER OF SECRETS HAS BEEN OPENED. ENEMIES OF THE HEIR, BEWARE" written in foot-high words on the wall, with Mrs. Norris, the caretaker's cat, hanging stiff and Petrified beneath it. The attacks escalate: Colin Creevey is Petrified while trying to take a picture of the monster, and Justin Finch-Fletchley and Nearly Headless Nick are both attacked, with Nick left black and smoky, his head half off. The Basilisk's method of killing is indirect—it Petrifies rather than kills because its victims do not look it directly in the eye. Colin sees it through his camera, which melts the film; Justin sees it through Nearly Headless Nick, who takes the full blast; and Hermione and Penelope Clearwater are found with a mirror, suggesting Hermione had realized the monster was a Basilisk and warned the first person she met to look around corners with a mirror first.

Harry's ability to hear the voice is explained when he learns he is a Parselmouth—he can speak to snakes. This ability, which he shares with Salazar Slytherin and Tom Riddle, marks him as a potential heir in the eyes of his classmates, but it also allows him to understand the Basilisk's movements. The creature travels through the plumbing of the castle, which is why Harry hears its voice inside the walls. Hermione's note, "Pipes," scrawled at the bottom of the Basilisk page, is the key that unlocks the mystery.

The Battle in the Chamber

When Ginny Weasley is taken into the Chamber, Harry and Ron, accompanied by a reluctant Gilderoy Lockhart, descend through a pipe in Moaning Myrtle's bathroom. They find the shed skin of the Basilisk, "a gigantic snake skin, of a vivid, poisonous green," which must have belonged to a creature at least twenty feet long. After Lockhart's Memory Charm backfires and traps Ron behind a rockfall, Harry proceeds alone into the Chamber itself. There he confronts Tom Riddle, a memory preserved in a diary, who reveals that he is Lord Voldemort and that he has been controlling Ginny through the diary. Riddle summons the Basilisk from the mouth of a giant statue of Salazar Slytherin, commanding it to kill Harry.

The Basilisk is described as "bright, poisonous green, thick as an oak trunk," with a "great blunt head" and fangs "long and thin as sabers." It is blind, having had its eyes punctured by Fawkes the phoenix, who arrives to aid Harry. Despite its blindness, the Basilisk is still deadly, and it lunges at Harry, who drives the Sword of Godric Gryffindor—which appears from the Sorting Hat—into the roof of its mouth. As the Basilisk keels over, one of its fangs sinks into Harry's arm, poisoning him. However, Fawkes's tears heal the wound, and Harry, realizing the diary is the source of Riddle's power, plunges the Basilisk fang into the diary, destroying it and causing Riddle to vanish. The Basilisk lies dead, its body a testament to the battle.

Symbolism and Significance

The Basilisk is more than a physical threat; it is a cultural monster that embodies the anxieties of the wizarding world. Its petrifying gaze represents the paralyzing fear of the other, and its dwelling in the plumbing—hidden, unseen, yet ever-present—suggests the repressed history of blood purity that lurks beneath the surface of Hogwarts. The creature is a tool of the Heir of Slytherin, who seeks to enforce a pure-blood ideology, and its attacks target Muggle-borns, the very students who represent the integration of magical and non-magical worlds. The Basilisk's defeat, achieved through Harry's courage and the loyalty of Fawkes, symbolizes the triumph of choice over bloodline, as Dumbledore later explains: "It is our choices, Harry, that show what we truly are, far more than our abilities." The monster's death also marks the end of the immediate crisis, allowing the Petrified victims to be revived and the school to return to normal, but the memory of the Basilisk lingers as a reminder of the dangers of prejudice and the power of unity.