Shinkuro

Shinkuro is a sword said to have been made of all the earthly delusions of man. This blade is said to be a blade of pure illusion, it is not known whether the blade is real or yet another illusion. Shinkuro is capable of creating multiple copies of itself.

Background
Shinkuro is said to have been made by an unknown sage, suspected to be the Sage of the Six Paths, when the world was filled with lies. He is said to have made the sword using Shadow Style alone. This lead to the sword being called the Sword of Delusions.