The Hyakki Gokurei is a hyper-stylized, ornate weapon with a curved, asymmetrical blade that glows with a vibrant, luminous aura. The blade's surface features intricate engravings of mythical creatures, set against a dark, metallic base with a polished, reflective finish. The handle is wrapped in red fabric, contrasting sharply with the blade's eerie glow and adding to its menacing presence.