The Hyakki Gokurei is a hyper-stylized, ornate weapon with a curved, asymmetrical blade that glows with a vibrant, luminous aura. Its surface is smooth and polished, featuring intricate engravings of mythical creatures and symbols, with a color scheme that shifts between dark purples and bright blues, giving it an iridescent finish. The handle is wrapped in dark leather, providing a stark contrast to the glowing blade, and is adorned with small, glowing orbs that pulse with energy.