The Hyakki Gokou is a legendary, hyper-stylized 3D anime weapon with a sleek, elongated katana form, featuring a blade that glows with a vibrant, luminous blue energy. The hilt is wrapped in dark, weathered leather, contrasting with the polished, metallic guard adorned with intricate, engraved demonic motifs. The blade itself is slightly curved, with a razor-sharp edge and a surface that appears to ripple with energy, giving it a dynamic, almost living appearance.