Demon Slayer: Frostblade and the Broken Oath

The vow beneath the dry well was where the Frostblade began.

I once thought I would spend my whole life burning for revenge, but amid the shifting light and shadows, I came to understand the weight of protecting others.

Frost gathers on the blade, and pure blood breaks through the darkness.

Even with demons running rampant and the night stretching on without end, I swear to defend that one small, warm light in the human world with my body and my sword.