Zagreus' Call is a divine artifact resembling a glowing, ornate horn with intricate Greek patterns etched into its surface. The horn curves elegantly, ending in a sharp point, and is made from a mysterious, luminous material that shifts between shades of red and gold, mimicking the fiery essence of the Underworld. Its surface is smooth yet features subtle embossed designs depicting scenes of battle and triumph, glowing faintly when activated.