Dumbledore and Voldemort had found each other in the center of the Hall.
Ron stopped moving when this happened — not because it required his attention, but because what was happening between them in the center of the atrium required the specific quality of space that only very large magic between very powerful practitioners required. The air around them had changed — not visibly, not dramatically, but perceptibly, the specific register of the magical environment shifting in the way it shifted when something foundational was being worked at.
Voldemort cast first.
The spell was not one with a known incantation — or rather, it was not one that Ron had encountered in any of the texts he had read, and he had read most of the available texts. It had the quality of something Voldemort had developed or found in sources that were not in any library Ron had accessed. The effect was a wave — not directed at Dumbledore specifically but at the space around him, the specific tactic of someone who was trying to disrupt the environment rather than the person.
Dumbledore did not deflect it. He absorbed it — the specific technique of taking something into the ward structure and redirecting it, which was advanced enough that Ron had read about it in theory and had practiced it twice and would not yet use it in a live situation. In Dumbledore's hands it was so fluent it barely looked like a technique. It looked like the wave had simply changed its mind.
Then Dumbledore cast.
The spell was Fulgur — not the standard lightning charm but the deep version, the one from the Roman magical tradition that texts from Dumbledore's personal library had discussed in its chapter on weather-derived combat magic. It was the colour of the sky before a storm and it hit Voldemort's shield with the specific concussive quality of something that had weight behind it, and Voldemort's Shield held but Voldemort had to move back two steps to hold it, which was the first time Ron had seen Voldemort move back for anything.
Avada Kedavra — Voldemort, casting the killing curse with the quality of someone for whom it was a first response rather than a last resort.
Dumbledore sidestepped. The golden statue from the fountain — the witch, the large one — moved in front of it, taking the curse, the stone splitting silently.
Serpensortia maxima — a great conjured serpent, fifteen feet, moving toward Dumbledore with the speed of something controlled by someone who could speak to it.
Dumbledore transfigured it in mid-movement — not Vanished, transfigured, into a long rope of fire that reversed its direction and came back toward Voldemort.
Voldemort Vanished it.
The exchange had taken eight seconds.
Ron was watching and assessing and moving simultaneously, and what he was assessing was the specific quality of Voldemort's casting — the power, which was immense, and the nature of it, which was the nature of someone who had been operating at the peak of their ability for sixty years and had the complete confidence of that mastery. Not reckless. Not emotional. The cold purposefulness of someone who had decided what they were and was it entirely.
He thought: Dumbledore can hold this. He cannot win it quickly. The Cup needs to go first.
He found Harry.
Harry was at the eastern edge of the Hall, having dealt with the two Death Eaters he had taken, now moving with the specific quality of someone who was looking for the right moment. He had his hand in his robe pocket. He caught Ron's eye.
Ron tilted his head: now.
Harry moved and found a pillar and got behind it — not hiding, positioning, the specific distinction of someone who needed thirty seconds of relative quiet to do a specific thing and was creating the conditions for it. He drew out the Cup. In the light of the atrium battle it had the specific quality it always had: beautiful, ordinary-looking, the specific deception of a Horcrux which was always that it looked like what it was supposed to be rather than what it actually was.
He looked at the Sword in his other hand.
He had one chance to do this correctly. The basilisk venom in the blade would do the work — had always been designed to do the work — but the contact needed to be complete, not glancing, the full edge of the blade through the body of the Cup in the specific way that Horcrux destruction required.
The battle moved around Ron. A Death Eater stumbled past his pillar — His dad behind him, not yet having landed the decisive cast. Ron extended his foot. The Death Eater went down. His dad's Stunner landed cleanly.
His dad nodded acknowledging the help, already moving.
Ron then stepped into the centre of the Hall.
The magic he was carrying — the accumulated result of five years of structured ritual work, the rituals of expansion and the rituals of core deepening and the specific deepening of the Ravenclaw and Black library methodologies, the Tuesday sessions with Dumbledore — was not something he performed. It was not something he displayed. It was simply what he was, in the way that things you had been building for long enough became simply what you were. He was approaching Dumbledore's level. Not at it — Dumbledore was a century of practice and a specific quality of magical depth that could not be replicated in fifteen years — but close enough that what he could do in the space of the central Hall of the Ministry of Magic on the evening of the twenty-fourth of June was considerable.
He cast two spells simultaneously — a thing that was theoretically possible and practically very difficult and which he had been practicing since fourth year. The first was directed at the Death Eaters at the edges of the room, not Voldemort's immediate combatants but the ones who were managing the Order members, a broad Incapacitation ward that required the specific power to hold it across the space of the atrium rather than direct it at an individual. The second was directed at the floor between Voldemort and Dumbledore — not at Voldemort, not yet, but at the magical environment they were fighting in, a disruption of the specific ward structure Voldemort had been building into the floor over the course of the engagement, because Voldemort always built into his environment during extended combat, it was one of the things about him that was consistent across all the accounts Ron had read.
The ward disruption hit Voldemort's floor working at its weakest point.
Voldemort turned.
He looked at Ron with the specific quality of someone who had assessed many practitioners across many decades and was performing that assessment now, in the specific context of recognizing that what was standing in front of him was not what he had expected to find in this Hall.
'What are you,' Voldemort said. Not to intimidate. As a genuine question, the quality of someone whose information had proved incomplete.
'The consequence of messing with death,' Ron said.
He cast.