The Umbral Glaive is a sleek, sinister weapon with a curved, double-edged blade that tapers to a sharp point. The blade is made of a dark, shadowy metal with a matte finish, featuring subtle engravings of swirling mist patterns that seem to absorb light. The hilt is wrapped in dark leather, providing a secure grip, and is adorned with a small, glowing purple gemstone at the pommel, emitting a faint eerie glow. The overall design is both elegant and menacing, perfectly suited for stealthy assassins.