Seiryou Engetsu

Seiryou Engetsu (青龙偃月刀, Green Dragon Crescent Blade) is a special sword that belongs to Hayate Hōzuki, the newest member of the Seven Swordsmen of the Mist. It takes the form of a large katana with green dragon scales on the backside of the blade. It has a circular golden coloured guard with the hilt of the sword wrapped up in white bandages. Because of its large size, it is usually sealed within a summoning scroll or seal mark placed on Hayate’s clothes. The power of the katana is great enough that it can deliver a blow that will cut through the flesh and bone of an opponent with the precision and ease of surgical steel. Little is known about the weapon's origin besides the fact that it started out as a basic blade that once belonged to an unknown courageous warrior. No one is quite sure on how it ended up in the hands of the Hōzuki clan or how it was acquired, but it is said to be infused with the bones of the spirit beast.