The oath under the dry well is the starting point of Frost Blade.
I once thought that this life would only be consumed by revenge, but in the interplay of light and shadow, I understood the weight of protection.
The frost condenses the blade, purifying the blood and breaking the darkness.
Even though the evil spirits are rampant and the night is long, this body and this sword swear to guard the little warm light in the world.
Interesting plot and detailed characterization