Ghalali Key

Ghalali Key is mythical artifact appearing in Tomb Raider: Legend. It is not part of the Excalibur sword, but a key artifact needed to reforge the sword in case it is broken.

History
Richard Croft found the Ghalali Key in a temple in Ghana and later gave to his wife, Amelia Croft as a present. She wore it as a necklace and had it on during a plane crash in Nepal. It snapped off of Amelia during the crash and was left inside the plane wreck.

Years later Lara Croft looking for the Ghalali Key returned to the wreck, there, she retrieved the artifact just in time and used it to reforge Excalibur.

Trivia

 * Although the Galali Key is needed to reforge Excalibur back together after broken, it can be disassembled without the need for the key. This is proven by the fact that King Arthur's knights were able to separate the sword fragments while the key remained undiscovered in Ghana.