The Horn of Boreas is a mystical artifact resembling a large, spiraled horn with intricate engravings that depict ancient Greek motifs and symbols of the North Wind. Its surface is smooth yet slightly weathered, suggesting age and use, with a color palette of icy blues and silvers that shimmer faintly as if imbued with frost. The horn's tip is adorned with a small, glowing crystal that emits a soft, pulsating light, hinting at its magical properties.