When Shadi tested Dark Yugi, he used four ushebti to represent Yugi's heart and one larger one to represent his own. If a weakness in either of their hearts was shown, their ushebti would break. Anzu, who was possessed by Shadi was made stand motionless on a board suspended over the side of the university roof, by a series of ropes. The ropes were string through the Millennium Key and tied through a fence to Yugi's ushebtis. The Millennium Key was held up by a rope tied to Shadi's ushebti.