Mage Stone

"Wonder of the ancients. Lost for a thousand years or more."

- Gaius to Merlin

The Mage Stone is a powerful tool of magic that can be used to harness the power of transmutation. It was lost for more than a thousand years before reappearing in the possession of the renegade sorcerer Tauren.

History
While in Camelot, Tauren used the Mage Stone to turn melted lead into gold. He fled when he was discovered by Arthur and the Knights of Camelot, and though he managed to escape, he dropped the Stone in the confusion and was forced to leave it behind.

The Stone was later retrieved by Morgana, who returned it to Tauren and recruited him and his men to help assassinate Uther. However, she ultimately changed her mind and killed Tauren instead (To Kill the King).

Abilities
The Mage Stone possessed magic so powerful it could be sensed across great distances. It could be used to perform transmutation, which is to change the very essence of things. Tauren, for example, used it to turn melted lead into gold.

The Stone was also shown to be capable of absorbing and deflecting magical blasts of energy (To Kill the King).

Trivia

 * The Mage Stone may be made from Baltic amber like other medieval items.
 * In Gaius' Grimoire, the Mage Stone is depicted with several runes: E O L/I G B P S (To Kill the King).
 * It is unknown what happened to the Mage Stone after Tauren's death. However, it is likely that it found a place in Camelot's vaults alongside other forbidden magical objects (To Kill the King).

Mythology
The Mage Stone is based on the Philosopher's Stone, a legendary object said to be capable of transmuting any metal into gold or silver. It is also useful for rejuvenation and achieving immortality, which for centuries was the most sought goal in alchemy.