Death Sword is an enemy boss from the Wii and GameCube video game The Legend of Zelda: Twilight Princess. He's a mini-boss, though nevertheless a notable one. This ghostly apparition wields a mighty and potent sword that can easily strike the hero of the game, Link, down.
The Legend of Zelda: Twilight Princess
Once you enter the room in which the Death Sword rests, you'll see his blade hanging from multiple ropes. Link must cut one of the ropes, which will cause the phantom within to be liberated, which will start the battle. As a human, Link is not capable of seeing the Death Sword, implying that you must go into your wolf form to actually see him. It'll attack by planting its sword into the ground, though afterwards it'll be stuck for a few seconds, allowing you to go in and attack. Following this event, you must then shoot the beast with arrows or your clawshot. Once Death Sword is killed, Link will be able to come in possession of the Spinner.
While not confirmed, it's been suggested that Death Sword was long ago executed by whomever by hanging, as throughout the fight his head is greatly slanted.