I Have to Sacrifice Lifespan to Improve My Cultivation? Then I'm Done Living

The Divine Martial Dynasty is plagued by demons and monsters.

Xie Mu is reborn as a low-ranking jailer in the Demon-Suppression Prison, with only three days left to live.

Luckily, he awakens the innate ability Sacrifice. By sacrificing his own lifespan, he can endlessly improve his cultivation and techniques. He can also absorb the blood essence of demons and monsters and turn it into lifespan.

Sacrifice nine thousand years of lifespan to obtain fifty years of life and one copy of the Sunflower Manual;

Sacrifice a Saintess of the Demon Race to obtain one hundred years of life and one copy of the Yin-Yang Amorous Union Art;

Sacrifice the leader of the demonic cult to obtain two hundred years of life and one Banner of Ten Thousand Souls;

Years later, the demons and monsters in the Demon-Suppression Prison are all skin and bones.

The leader of the demonic cult: He comes every night. I can't take it anymore…

The Saintess of the Demon Race: I'm really almost drained dry…

The Nine-Thousand-Year-Old: I don't have a single drop left…