Onaga's Horn is a large, curved horn with a dark, almost black base color, featuring intricate red and gold dragon-themed engravings that spiral around its length. The surface is smooth with a slight gloss, resembling polished bone or horn, and the tip is sharpened to a point, suggesting it could be used as a weapon. The horn's interior is hollow, with a slight iridescent sheen when light hits it at certain angles, hinting at its mystical origins.