You Dug Out My Sword Bone? My Fiancée Kneels and Begs Me Not to Kill the Chosen One

My fiancee and master joined forces to rip out my Supreme Sword Bone and poison me blind. I became a disabled corpse collector, the lowest of the low in the Demon-Slaying Bureau.

I thought all I could do was cough up blood and wait to die, but then I unexpectedly awakened the [Heaven's Mandate Snatching System]!

This lightless dungeon is filled with forbidden demon gods destined to be trampled underfoot by the chosen heroes of the future?

I toss half a moldy bun to feed a vicious little half-demon girl, then secretly teach her the Heaven-Swallowing Demonic Art.

Until the day the chosen hero who stole my Sword Bone breaks into the prison with his men, intending to drain her blood to refine pills.

As the jailer's executioner's blade comes down, the blind man who sweeps the floor and coughs blood gently snaps the broken broom in his hands.

In an instant, a flash of swordlight rises, and every god and demon in the prison is stunned!

When my haughty fiancee finally uncovers the mastermind and kneels in a sea of corpses, weeping bitterly in regret, I take the empress's hand and whisper, “I may be blind, but to kill you, all I need is to hear where you are.”