|A crystal that radiates blue light. It is an Item required to evolve the mock Unit based on Karl. The memories of the real Karl, who was able to unleash the powers within him thanks to the deep bonds of trust he formed with his friends, are sealed within this crystal. The help of Noel from the Akras Summoners' Hall was enlisted to purify this stone, along with the guidance of the mythical creature in charge of the Imperial Library. Karl has been the first mock Unit to cooperate with the research being conducted about his own self.