Harry Potter didn't kill the serpent but Neville Longbottom used Godric Gryffindor's sword to kill the serpent.
Severus Snape put the sword at the bottom of a lake and then led Harry to it.
The sword was Godric Gryffindor's sword.
a sword
Yes , he found the sword in the Forest of Dean
Harry used the sword of Godric Gryffindor.
Severus Snape.
It is in the hogwarts castle
it's called chamber of secrets. and faux the phoenix brings the sword to harry...
With Godric Gryffindor's sword...
Severus Snape.
Harry, Hermione, and Ron still have it.
Yes, Harry kills the Basilisk with the sword of Godric Gyffindor.