Draco had imagined ruling Slytherin. On the first night, he learned the first rule of the house: you don't rule it, you buy it.
The common room was not a room so much as a market after hours, and everyone in it was trading. Draco saw it within ten minutes, standing just inside the stone door with the green water pressing against the high windows and the whole place lit like the bottom of the lake, which it was.
The fire in the great carved grate burned low and green, and the flames threw long shadows up the walls, and the shadows looked, to Draco's eye, like the bars of a cage. He did not know why that was the first thing he noticed. He filed it.
The older students traded in fear, a word here, a look there, and the younger ones bent like reeds. The middle years traded in favours, owed and called in with quiet precision. And underneath it all ran the oldest and quietest currency: family name, blood, standing.
Gold, Draco noticed, was almost nowhere. A Malfoy could buy his way into Slytherin's good graces with a handful of Galleons, certainly. But the real currency, the loyalty and the fear and the favour, moved by older rules.
He watched a prefect, a thin-faced boy with the look of a collector, stop a third-year with a single lifted finger. The third-year went pale, fumbled something into the prefect's waiting hand, and hurried off. No words had been exchanged. The whole transaction had taken perhaps three seconds, and Draco understood, with the cold clarity of a boy who had spent his life studying how money moved, that he was looking at the only market that mattered in this house.
He sat in a green leather chair by the fire, which burned low and green in the grate, and began, quietly, to work out the prices.
He found a quiet corner after the crowd thinned, and he drew out the little book he'd brought from home.
It was not the Ledger. It was his ledger, the one he'd started the night the future-memory first came, when he was too frightened to sleep. Leather, small enough for a pocket, and in it, in his own cramped hand, the plan.
He opened it to a fresh page and wrote a single line:
Know the price of everyone in this room.
Then he sat back and looked around, and the work began.
He already had names. The prefect with the face like an unbalanced ledger, a boy someone had called Vane, moved through the room like a collector, and Draco marked him first, because he was the one who mattered. The older girls who'd drawn the new first-years into a corner, sorting them like goods, he marked them too, and he noted which of them deferred to which.
Crabbe and Goyle, his by gravity, sat nearby, solid and silent, and Draco marked them without needing to think about it. Muscle. Not bright, but loyal in the way of boys who had been told all their lives to follow the biggest name in the room.
Pansy Parkinson had taken the seat beside him the moment it opened and had not moved since.
"You're going to run this place," she said, quietly, not looking at him, and there was no question in it. It was a statement of intent, hers as much as his, and Draco heard it and marked her accordingly. Useful. Sharper than she looked. Loyal for now.
Theodore Nott sat apart, by the window, watching the black water instead of the room.
Draco marked him last, and could not write a number next to the name.
It was late when Draco finally let the real Ledger open behind his eyes.
The common room had gone quiet. The fire had burned down to embers, green as the lake-light on the ceiling. Crabbe and Goyle had gone to bed, lumbering up the stairs without a word. Pansy had gone reluctantly, looking back at him once from the foot of the stairs as if expecting him to follow. Theodore had gone without a word, and Draco still couldn't decide whether the boy's silence was shyness or a calculation, and the not-knowing itched at him the way an unpriced thing always did.
He was alone. Good.
He reached into his pocket and found the little leather pouch his mother had pressed on him before the barrier. For emergencies, she'd said, and meant it as a comfort. It held eleven Galleons. Draco took out one and held it up to the green light, and the coin caught the glow and threw it back, and for a moment he was a boy looking at money in a dark room, and there was nothing strange about it at all.
Then he let the Ledger take it.
RECHARGE RECEIVED
1 Galleon → 1 Point
The Point settled into the credit column, a single bright mark in all that empty space.
And the future-memory dimmed.
This time Draco was ready for it. He had done this before, in a shop doorway in Diagon Alley, but he had not understood it then. Now he watched, the way you'd watch a thief, and he saw what happened: the memory of the Dark Lord's return flickered at its edges, and a piece of it went grey and stayed grey. A face in the crowd of Death Eaters, one he'd never been able to name anyway. Gone now. Not fuzzy. Gone, as if it had never been there.
He sat very still, and the green light moved on the ceiling, and he understood that this was not an accident. It was the price, and it was exact, and it would not be refunded.
Then he did it again. Another Galleon. Another Point.
RECHARGE RECEIVED
1 Galleon → 1 Point
And this time he watched a voice go. A cold, high phrase from the memory, the Dark Lord giving an order, thinned and faded until he couldn't hear the words anymore, only the shape of the anger.
Draco closed the Ledger and sat in the green dark, and he understood, fully and for the first time, what the trade was.
The system didn't run on gold. Not really. It ran on the one thing gold couldn't buy back.
Every point is a day I'll never get back, he thought. Every purchase is a piece of the future, spent.
And then, because he was a Malfoy, and because the alternative was unthinkable, and because a boy who had seen his father kneel would do almost anything not to kneel himself, he made the decision that would shape everything after.
It was a price worth paying.
The green light moved on the ceiling like slow water, and Draco lay awake long after the others slept.
He ran the sums in his head, because running sums was what he did when the fear began to press. Eleven Galleons, now nine. Two Points, unspent. A face and a voice, gone from the future, and the cold knowledge that they were not coming back.
The lake pressed against the windows, black and patient, and Draco watched the light and thought about the deal he'd just made with himself.
Know the price of everyone in this room, he'd written. But it wasn't the room he was afraid of. It was the price of himself, of what he was willing to spend, and of what he'd have left when the spending was done.
The future-memory ticked in the dark behind his eyes, a clock he could hear but not see, and Draco Malfoy, eleven years old and already older than anyone knew, counted the cost and called it acceptable.
It was the first real lie he'd ever told himself.