The Philosopher's Stone is a magic stone that was created by Gammel Dore, Lujei Piche, and the Archmage. The Stone is supposed to have immense magical power that can grant its owner any wish. This power stirred both Lujei's and Calvaros's greed and they plotted to take it for themselves. However both perished while attempting to carry out their scheme. The Philosopher's Stone is the cause of Lillet Blan constantly going back in time. The stone is also hidden under the floor in Lillet's room. During the fifth and the last time loop when Lillet finally reaches the stone, she destroyed it and ended the time loop.