"What makes you think it's over?"
His own voice surprised him — clearer than it should have been, steadier than his body had any right to produce. Kevin pressed one hand to the frozen ground and pushed himself up.
Voldemort stared.
Dumbledore, held fast by the cursed array only moments ago, dragged his eyes to Kevin and went very still with a kind of relief that had nothing polished about it.
Kevin got to his feet.
The system was gone — that much he felt immediately, the absence of it clean and absolute, like a sound that had been running so long you'd stopped noticing it until it stopped. No interface. No stat readouts. No mission counter ticking away in the corner of his awareness.
Just him. Entirely himself, entirely here, weight and warmth and the cold air filling his lungs.
Ordinary Archmage, Grindelwald had called it. Strength A-rank. Speed A-rank. He hadn't understood, until this moment, what ordinary would feel like when you'd been carrying a transmigrator's cheat menu for five years.
It felt like solid ground after a long time at sea.
The Sword of Gryffindor was in his hand — he'd found it waiting for him when he'd come back, the way it always found the people it decided needed it. He drove the point into the earth to steady himself, felt the rubies catch the cold light, and looked at Voldemort across the ruin of the valley.
"You're celebrating too early."
He smiled, and pulled the sword free, and charged.
Voldemort recovered fast. Of course he did. The shock of a dead man standing had cost him perhaps two seconds, which was two seconds more than Kevin could expect to get twice.
"Avada Kedavra!"
Kevin rolled aside. The green light split rock where he'd been standing. He closed the distance with a burst of speed that surprised even himself — A-rank, not the system, just me — and swung the sword in a downward arc.
The blade caught fire as it moved. That was the Avada Kedavra enchantment responding, the spell woven into the steel in the valley before any of this had begun, and when it hit the ground and the explosion bloomed it was not ordinary fire but something greener and colder at its core.
Voldemort vanished from the centre of the blast. Kevin had expected that.
He straightened and extended his free hand, wand in it, and aimed at Dumbledore without turning — Curse Upon All Curses, the counter-hex he'd developed specifically for Voldemort's array. Purple light sank into Dumbledore and broke the grip of the array on him. A moment later he flicked the wand at Grindelwald.
Voldemort's counterstrike came from the left: a water wall, enormous, smothering the residual flames and buying him time to reset.
Kevin let him have the moment.
He called up the sword's power again — gold light building along the blade, the flames rising bigger this time — and charged the wall at a dead run. One horizontal slash bisected it completely, water crashing around him in curtains, and Voldemort was standing on the other side with his teeth set and his wand already moving.
Kevin got in close before the next spell could form. The Avada Kedavra on the blade made contact.
It was not a cut. Not in any physical sense. Voldemort's body remained intact — his own immunities guaranteed that. But the enchanted edge found something else, something the immunities didn't cover, and when it tore across his chest Voldemort's pupils contracted to pinpoints.
"Ugh —"
The scream that came out of him was not entirely physical either.
Kevin bounced back, regrouped, pressed in again. Each time the blade touched Voldemort — each time that green edge dragged across wherever the shattered, reassembled scraps of his soul were housed — the scream got worse. Voldemort swung to retaliate, and Kevin moved, and the water shields made useful platforms, and the rhythm of it became almost methodical.
This was what the sword was for. Not the body. The soul.
"Headmaster —" Kevin glanced back over his shoulder. "Hogwarts. It's under attack right now. Go."
Dumbledore, fully freed from the array, looked at Kevin and then at Grindelwald.
Grindelwald met his eyes. "I'll explain. Go."
Something passed between them that Kevin didn't try to read. Dumbledore turned and Apparated.
Kevin turned back to Voldemort.
"Grindelwald told you I was dead," he said pleasantly. "That part was true, for about twenty minutes. I want you to know that — just so you have a sense of how the day's gone."
Voldemort raised his wand.
Kevin raised the sword.
The plan had been Grindelwald's, but Kevin had agreed to it, and the difference mattered.
Grindelwald had laid it out in that first conversation at Hogwarts — the one where he'd dropped the performance and shown Kevin something real. You have a death-curse on you. I can see it. Stage three is coming and you won't survive it. The only way to burn it out was to meet it early, on controlled terms, as a deliberate act. Fake a death. Give Death what it wanted. Walk out the other side.
Kevin's first answer had been no.
His second answer, after Grindelwald described exactly what stage three would look like when it arrived — not quickly, not cleanly — had also been no, but with less certainty.
His third answer, which had come after a long silence in which he'd thought about Hermione, and his parents, and all the people who'd be standing around him when it finally happened if he didn't do something now, had been yes.
The system's disappearance he hadn't grieved. It had been a borrowed thing from the start — a foreigner's tool in someone else's world. The world had made him its own now. Whatever happened next would be his to own completely.
He'd been a glitch. Now he was just himself.
That, to his considerable surprise, felt like more than enough.