The Blackwood Estate was a monument to a glory that had died a century ago. The pillars were cracked, the gardens were overgrown with choking vines, and the air smelled of damp earth and old secrets.

My father had been the master of the house, a man who believed that the world was a puzzle to be solved with mathematics. When the Great Famine hit the South, he didn't pray for rain; he built an abacus.

"Survival is a matter of distribution, Elias," he would say, his eyes gleaming with a feverish light. "We must calculate the exact amount of grain required to keep the essential members of the family alive. The rest are simply... variables."

I grew up in the shadow of that abacus. I watched as my cousins were sent away to the tenant farms, their 'utility scores' deemed too low. I watched as my mother faded into a ghost, her rations cut to the minimum to support my father's 'research.'

By the time I inherited the estate, I was the only one left.

I spent my years in the library, obsessed with my father's notes. He had been searching for a 'Perfect Equation'—a way to ensure the survival of the Blackwood line regardless of the external environment.

I found the equation in a hidden compartment of his desk. It was beautiful. It was elegant. And it was monstrous.

The equation required a 'Substitute.' To keep one person in a state of perfect health and longevity, another person of the same bloodline had to be kept in a state of absolute deprivation and agony. The life-force was not created; it was transferred.

I looked at the records. My father hadn't just sent my cousins away. He had kept them in the cellars, their bodies withered and broken, their suffering fueling his own vitality.

I felt a surge of horror, but beneath it, a darker curiosity. I was dying. The same wasting disease that had taken my mother was now eating away at my lungs.

I went down to the cellars. I found the last of them—a brother I had forgotten, a creature of skin and bone, chained to a wall of weeping stone.

I looked at the abacus. I looked at my brother.

I could save myself. I could use the equation to steal the last few sparks of life from this wretched creature and live for another twenty years.

I stood there for a long time, the silence of the house pressing in on me. I thought of the generations of Blackwoods who had survived by eating their own. I thought of the rot that had seeped into the very foundations of the estate.

I didn't use the equation. Instead, I walked to the cellar door and locked it from the outside. Then, I went upstairs and set fire to the library.

As the flames consumed the abacus and the notes, I lay down in the center of the burning room. I felt the heat searing my skin, but for the first time in my life, I felt warm.

The Blackwood line ended that night, not with a calculation, but with a fire.

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