Tenseiga!
Story:
This is an interesting sword weilded by Sesshomaru.
This sword was made by Toutousai using another one
of Inutaisho's fangs. It is basically the opposite
of Tetsusaiga having the power to heal 100
people in one swipe of it's blade. Because
of this Sesshomaru despises Inuyasha because
he thinks he has no use for Tenseiga, but his father
gave the strong sword to Inuyasha. However,
Sesshomaru does use his sword eventually first
to
revive Rin and then to revive Jaken
and he also uses it many other times.