Guan Dao is a sword with a long handle which resembles a spear. Also referred to as the Blue Dragon or Black Dragon. Guan Yu's Guan Dao was called "green crescent moon dragon."
After Guan Yu was captured and executed by the Wu Dynasty, Sun Quan gave the weapon to one of his generals. Guan Xing, Guan Gong's son, later defeated that officer and reclaimed his father's blade.