Thanos' Sword is a massive, double-edged blade with a curved, menacing design, featuring a dark purple and gold color scheme that matches Thanos' iconic armor. The sword has a smooth, metallic finish with subtle glowing purple energy emanating from the grooves along the blade, giving it a powerful and otherworldly appearance. The hilt is ornate, with intricate gold engravings and a large, central gem that pulses with energy, emphasizing its legendary status and destructive capability.