The Hyakki Gokufu is a legendary, ornate katana with a hyper-stylized 3D anime aesthetic, featuring a sleek, curved blade with a razor-sharp edge that gleams with a metallic sheen. The hilt is wrapped in dark, weathered leather, adorned with intricate golden engravings of mythical creatures, and the guard is a complex, asymmetrical design resembling swirling flames, crafted from polished black metal with crimson accents. The blade itself emits a faint, luminous glow, suggesting its supernatural origins and power.