Because of the strong vitality of the guardian, Heve had slightly recovered her strength after resting for some time. She stood up with the help of Lemendusa and carried out a series of complex operations beside the stone platform of about thirty meters in diameter. The stone platform looked nothing special. It was just a huge work surface, made of obsidian material. There was a ring of obscure patterns and green crystals around the stone platform, and a tall crystal pillar of several meters high beside the stone platform. Heve knocked on the top of the crystal pillar briskly and made a series of clear and melodious sounds, and then the stone platform suddenly trembled.