A circular stone plate with a detailed engraved skull symbol at its center, slightly raised and worn from time. The plate has an ancient, mystical design with cracks and subtle glowing veins running through it. The skull design is bold and intimidating, featuring deep, hollow eyes and a sinister grin. The surface of the plate is textured, resembling weathered rock or aged metal. The plate is designed to change colors when stepped on, used as a puzzle mechanic in a dark, mysterious temple.