Rosalind ended the dinner the way she did most things: with the specific economy of someone who had thought about what the correct ending was and was now executing it.
"Your performance today was serious work," she said. "The analysis you ran in the suite over the past three days — I've been thinking about the approach. You don't just prepare; you build a model and then confirm it in the field." She looked at the team. "Go sleep. Tomorrow the model gets tested again."
He inclined his head. The team gathered themselves.
Professor Candle was in the corridor between the palace and the academy transport, which was either coincidence or Candle, and given the time she had been teaching this had been true of everything she did, it was Candle.
"Briefing room," she said. "Before the dorms."
The room was soundproofed and small and had the specific institutional quality of spaces designed for the kind of information that left through whoever entered it and not through the walls. She activated the projector without preamble.
"Tomorrow's semi-final: the Valerian Military Academy first team," she began, and her voice had the register she used in weapons class when she was not performing pedagogy but delivering information she considered operationally important. "What I'm telling you now is classified at the Ministry of Defense level. It does not leave this room."
She let that settle.
"They do not win with spectacle. They are not going to produce a technique you find impressive and then try to impress you further. What they do is build a formation that absorbs engagement and does not break, and they do it through a coordination model that is military in origin rather than academic."
The projector showed the geometric diagram — a phalanx formation built on mana-channel interconnection, the specific architecture of a system where individual nodes were replaceable because the system's function did not reside in any single node.
"This is the Iron Dome," she said. "Standard Military Academy formation. Not standard as in basic — standard as in the foundation every cadet is built on before anything advanced is layered on top. The principle is redundancy: when one practitioner takes a hit, the grid redistributes the absorbed energy across the full formation. You are not fighting five individuals. You are fighting a single distributed system that happens to occupy five bodies."
She looked at them.
"The reason their record is clean is not because they are individually stronger than everyone they have faced. It is because most teams do not have a strategy for fighting a resonance feedback loop. You hit one person, the loop absorbs it, and you have spent mana on something that made the system stronger." She pointed to the formation's central node. "The fracture point exists, because all systems have fracture points. The question is whether you can identify the resonance frequency and apply force at the correct location before your reserves are depleted by hitting everything except that location."
She looked at Markus last.
"You have the raw output to break the dome through force. A sustained Spatial Domain application at 62% law comprehension against a Tier 3 military formation is probably sufficient." She held his gaze. "I'm asking you not to do that."
He waited.
"These are the Empire's own students," she said. "A demonstration that your unit can dismantle the military's most refined formation through coordinated strategy rather than individual power is worth more to this Academy — and to you — than a clean win by overwhelming force. If you can find the fracture point as a team, you will have demonstrated something that people will spend a long time understanding."
She turned the projector off.
"One hour," she said. "The room is yours. I won't tell you what the solution is, because the solution you find yourselves is the solution worth having."
She left without a formal close, which was typical.
The room erupted.
Not chaotically — with the specific energy of people who have been given a problem they are genuinely interested in and have forty-five minutes to solve it, which was a different quality from the chaos of uncertainty. The diagram was still on the wall from the projector's last frame. Mika was already at it, her finger tracing the interconnection pattern.
"Thermal fracture at the base nodes," she said. "The ice application — same principle as the obsidian shell. If we can create a temperature differential across the formation's lower tier—"
"The redistribution mechanism will address it before the differential is sufficient," Jessica said. "The feedback loop is faster than thermal propagation. We'd need to create the differential simultaneously across multiple nodes, and we don't have enough practitioners with the right affinity to cover the spacing."
"Lightning overload," Jessica continued. "The resonance loop amplifies incoming energy before redistributing it. If I can match the loop's frequency and then spike beyond what the redistribution can handle—"
"You'd need precise frequency matching," Donna said. "If you're slightly off, the spike feeds back into the loop rather than overloading it. That's the technique that breaks the caster, not the dome."
"Then we need the frequency," Mika said.
They looked at Markus.
He had been listening with the specific attention of someone who was building a model from the conversation rather than from the diagram. The diagram told him the structure. The conversation was telling him what the structure's failure modes were as understood by the people who would be working the plan.
"We have one additional variable the military formation hasn't accounted for," he said.
The room settled.
"The spatial domain," he said. "It doesn't interact with the redistribution mechanism the way conventional techniques do, because it doesn't apply force. It applies spatial law. The redistribution mechanism is designed to handle mana-based force applications. If I compress the spatial field inside the dome's perimeter, the redistribution mechanism has no framework for addressing a change in the coordinate geometry of the space the practitioners are standing in."
Mika stopped pacing.
"The Dome is a mana formation," he said. "Spatial law is not mana. Their defensive architecture is not built to account for the spatial field, because nobody they've faced has had 62% spatial law comprehension." He looked at the diagram. "What the domain does to the interior of the formation changes the environment the five practitioners are coordinating in. The redistribution mechanism requires their mana-channels to be in the correct spatial relationship to each other. If those relationships shift—"
"The redistribution breaks," Jessica said.
"The redistribution breaks," he confirmed. "And then the dome is five individual practitioners, which is a different problem."
"And then we have a different problem," Rosanne said, from the back of the room. She had been quiet for the past twelve minutes with the specific quality of attention she used when she was absorbing a problem from all available angles before speaking. "The fracture point is the spatial relationship between the nodes. The spatial domain introduces instability into those relationships. The fracture does not require high-impact technique. It requires maintained domain at sufficient law comprehension to introduce enough variance that the redistribution mechanism cannot compensate."
"Yes," he said.
"How long do you have to hold the domain while we work the individual engagements?"
"Long enough," he said.
"Specific number."
"Fourteen to eighteen minutes at low intensity, with maintained precision. The output cost at 62% is manageable."
She nodded. "So the plan is: you destabilise the formation's spatial relationships with the domain, the redistribution mechanism fails to account for spatial variance, the dome develops the fracture, we engage the individual nodes before the formation can reconstitute."
"Yes."
"And the girls run the individual engagements."
"Yes."
"And you hold the spatial domain."
"Yes."
She looked at him. "You're going to be bored."
"I'm going to be focused," he said.
"Those are different things."
"In this context, they're the same thing."
She made the sound. He acknowledged it.
The room's projector shut down with the automatic click of the hour completing — Candle's curfew arriving without negotiation.
They stood in the dark for a moment.
He reached over in the darkness and ruffled Rosanne's hair with the specific thoughtlessness of someone who has been doing this for ten years and has completely stopped considering whether it is appropriate.
"Don't build it up," he said. "Tomorrow you go out, you run the plan, you adjust when the plan meets the reality. If the reality exceeds what you can manage, I'll be right there." He opened the door. The corridor was dim. "The real thing we're checking tomorrow is whether the model we built tonight is correct. The win is secondary to that."
Rosanne fixed her hair.
"You say that," she said, "but I know you."
"What about me," he said.
"You care about the win," she said. "You just also care about the model being correct. They're both primary."
He considered this.
"Yes," he said.
She nodded, which was her version of: I knew it. "Let's go sleep," she said. "Semi-final tomorrow."