The Lonely Shadow of the Moat

In the troubled times of the Warring States Period, the one-armed ninja "Wolf" breaks into a city occupied by evil spirits to save his young protagonist. He bears the curse of "Shadow Death" - every time he dies, he takes away a bit of life from those around him. In the rain of blood and the light of the sword, he cut through the illusion, killed the old master, and finally split the reincarnation with the remaining blade, turning himself into a lonely soul so that the master could survive.