Transmigrated as a Sacrifice? I'll Burn My Lifespan and Level the Village

This is no mortal world. It is a slaughterhouse where ghosts and gods keep humans like livestock. Above the clouds, twelve supreme ghost gods sit enthroned. They are the laws of the world, its calamities, and the inescapable fate of mortals: time's decay, flames consuming the body, drowning in the abyss, spreading plagues, endless slaughter, famine across the land... Among mortals, twenty-four mid-ranking evil spirits roam, controlling every joy and sorrow in a person's life: marriage, funerals, luck at gambling, lawsuits, nightmares, harvests. Nothing is beyond their grasp. And those lofty cultivators are nothing but the most loyal lackeys of the ghosts and gods. They sacrifice the living and refine baleful energy, using it to build their foundations and prove their Dao. The stronger they become, the more blood stains their hands and the more souls weigh in their bellies. And ordinary people? They are merely cattle and sheep penned up in villages. On the fifteenth of every month, their blood is offered to Heaven. At every autumn harvest, boys and girls are sacrificed. Even their bones are dragged off to feed the ghosts after they die. They aren't allowed even a moment's peace. You never dare ask what lies beyond the mountains. Generation after generation, your people have been trapped in this despair. You know only this: refuse the sacrifices, and you starve; disobey, and the parasites inside you begin gnawing through your organs, inch by inch, until they hollow you out. This is the world I transmigrated into. And I carry the only path to survival: The Lifespan System. Kill ghosts, extend your life. Burn your life, grow stronger. Those who treat me like a sacrificial offering waiting to be slaughtered, an expendable speck of dust, will probably never understand one thing: Hunter and prey are never destined to be what they are. Starting today, the gods are livestock, the evil spirits are food, and the cultivators are bait. I'll be the one to keep you penned up.