Youmuu's Ghostblade is a sleek, dual-phase weapon with a blade that transitions between a solid, metallic form and a ghostly, ethereal state. The blade is long and slightly curved, resembling a traditional katana but with a more fantastical twist. Its hilt is wrapped in dark, shadowy fabric that seems to absorb light, and the guard is ornate with intricate, swirling designs that glow faintly with a ghostly blue hue. The blade itself is made of a polished, dark metal that reflects light in a way that makes it seem almost alive, with faint, glowing runes etched along its length that pulse with energy when activated.