I am the bone of my sword.
Steel is my body, and fire is my blood.
I have created over a thousand blades.
Unknown to death,
Nor known to life.
Have withstood pain to create many weapons.
Yet, those hands will never hold anything.
So as I pray, unlimited blade works.
这个是原版，是台词，具体问度娘
不是歌，是fate stay night里男主卫宫士郎使用无限剑制的咏唱，不过你贴出来的是咏唱的改编版
Teenage Dream 是这个吗？ 我也没听过。
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