Item from Chamber of Secrets by J.K. Rowling
A goblin-made silver sword with rubies in the hilt that appears from inside the Sorting Hat to any true Gryffindor in a moment of dire need. Harry uses it to kill the Basilisk -- and the blade absorbs the serpent's venom, making it one of the few objects that can destroy a Horcrux.
Also known as: the Sword of Gryffindor, Gryffindor's sword, the sword