The Hyakki Gokufu is a hyper-stylized, ornate katana with a blade that gleams with a supernatural luminescence, reflecting its 3D anime art style. The hilt is wrapped in dark, weathered leather, contrasting with the polished, metallic guard that features intricate engravings of mythical creatures. The blade itself is slightly curved, with a razor-sharp edge and a subtle glow that pulses with energy, suggesting its legendary status and combat prowess.