Tenseiga

The Tenseiga (&#22825;&#29983;&#29273;) is a fictitious sword from the anime and manga series Inuyasha that cannot cause injury to beings of the living world, but instead can only heal wounds or revive the recently dead. It can also allow the wielder to both see and slay beings from the afterlife.

It is wielded by the y&#333;kai Sessh&#333;maru. It was created by one of Sessh&#333;maru's father's fangs and is the opposite of its brother sword, the Tessaiga, which has the power to kill one-hundred y&#333;kai. It instead has the power to restore life to 100 beings (both humans and y&#333;kai). Sessh&#333;maru despises his inheritance because to use the sword he needs to be able to care for life, something he rarely does, and his desire for a sword that can destroy compels him to keep trying to get the Tessaiga from his half-brother Inuyasha. Eventually, he uses the power of the sword to revive the head of Goshinki (the y&#333;kai who bit through Tessaiga) and had the sword T&#333;kijin forged. While it is no Tessaiga, it is a formidable blade nonetheless.

Tenseiga has been used very sparingly, and only when it somehow compels Sessh&#333;maru to do so. He does not fully understand why the sword does this but it has almost always had some unforeseen benefit.

Being that it can harm beings of the afterlife, the guardians of the gate between this world and the next named Gozu and Mezu will not attack anyone who wields Tenseiga since it can actually harm them.

It is either unable or unwilling to help beings that never had a true soul to begin with, such as Kagura (who was made from wind).