What is Tetsusaiga?
1.
The sword used by Inuyasha in the anime of the same name, it is a sword made by the fang of Inuyasha's father, a full-dog-demon. Originally is a weak, rusted blade, but depending on its wielder's will to protect someone dear, the blade becomes a powerful fang-sword.
Kagome: I've got to take the Tetsusaiga to Inuyasha!
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