The Fused Shadow (影の結晶石 Kage no Kesshō Ishi?, Shadow Crystal) is a quest item from The Legend of Zelda: Twilight Princess. It is the physical manifestation of extremely powerful Shadow magic created by an "ancient race" and once used by a group known only as the Interlopers. This power was sealed away by the Light Spirits. While the Fused Shadow must be made whole again in order to unleash its full power, its pieces appear to hold a significant amount of power on their own, as they can curse individuals and transform them into monsters.