The Amulet of Will is a powerful artifact once used by Lord Casterwill in summoning and alluded to in the journal of Eathon Lambert. Legend states that anyone attempting to control one of the three Legendary Titans, Araknos, Behemoth, or Tao, without the Amulet of Will will be cursed. The four gems of the Amulet of Will represent these three Legendary Titans as well as the Legendary Titan of Immortality, Overlos: blue for Tao, green for Behemoth, red for Araknos, and white for Overlos, who was sealed in the Amulet of Will.