The fifth wave came on the ninety-first day and was the worst.

  Not in terms of numbers — the academy's response capacity had improved significantly over the previous two weeks, and the tears themselves were no larger than what they had faced before. What made it the worst was the coordination. For the first time, the Voidborn that came through were not operating independently. They moved in a pattern — not the sophisticated tactical pattern of trained combatants, but the directed pattern of creatures that had received instruction. Where to go. What to target.

  They targeted the Dormitory Seven members specifically.

  Sena detected it first — the specific directional quality of the Voidborn's attention, the way their orientation tracked Aether signatures that she recognized. She relayed it with three seconds of warning, which was enough for Damar to freeze the first combat-class creature mid-lunge and for Raka to pull the others into a defensive formation that Mira had already begun positioning them toward.

  But there were seven tears. And seven simultaneous targets.

  The faculty response handled four of them. Drev's perimeter team handled one, arriving faster than Raka had expected. That left two — both targeting members of Dormitory Seven at opposite ends of the campus — and two members of Dormitory Seven in positions that did not have immediate backup.

  Tobas was alone at the east maintenance point when his tear opened.

  He did not panic. Raka would learn this later and would not be surprised by it — Tobas's composure under pressure had been established well before tonight. He assessed the combat-class Voidborn that came through with the same structural attention he gave everything, identified the three points in its anatomy that his ability flagged as critical, and then did something he had never done before and had not told anyone he had been practicing: he hit all three points himself, in sequence, in the four seconds before the creature's full mass cleared the tear.

  Structural Perception, used not to guide someone else's strike but to direct his own.

  The Voidborn collapsed. The tear was still open. Tobas looked at it, thought about what Sena had done to stabilize the first tear through communication, and then did something that surprised everyone including himself: he reached toward it with his Structural Perception and found the load points that held the tear open, and he applied the precise counter-pressure that collapsed them.

  He closed a Void tear without help. Using an ability that was not, in anyone's prior classification, a combat or dimensional ability at all.

  He would explain this afterward with the composure of someone reporting a minor technical finding: 'A Void tear is a structural failure. Structural Perception reads structural failures. It was the same principle.'

  Raka, hearing this, thought about all the ways an ability can exceed its classification if the person using it is willing to think past what it's supposed to do.

  He also thought about the other tear. The one targeting the other undefended member of his team.

  * * *

  Raka had been running since Sena's warning. The campus was large and he had started from the wrong end of it and the tear on the west side had opened before he was within a hundred meters.

  Unauthorized duplication: this tale has been taken without consent. Report sightings.

  What came through was not combat-class in the standard sense. It was larger than anything they had faced so far — not the horse-sized creatures of the earlier waves but something that occupied a different scale entirely, that had to compress itself to fit through the tear and that expanded on the other side with the deliberate quality of something that had been waiting for exactly this opportunity.

  And it went directly for Sena.

  Because Sena was the one who could hear it. The one who had been listening to the Heart. The one who had communicated through the north tear during the second wave and done something to the Void-side pressure that had disrupted Arkhavel's control over the tear network for approximately six hours. She had been the most consequential action on their side in any of the waves, and whatever directed this creature had identified that.

  Sena stood in the west courtyard and looked at what was coming toward her with the expression she always had when confronted with something from the Void — not fear, because her relationship with Void creatures was too complicated for simple fear, but a kind of grave recognition.

  'I know what you are,' she said, in the not-language. 'And I know who sent you. And I know you are afraid of what you have been told to do.'

  The creature slowed. Not stopped — its instruction was too strong for simple speech to override. But slowed.

  And in that slowing, Raka arrived.

  He was running and he was out of prepared strategy and he was out of the careful valve-controlled borrowed force that Sera Vane's notebook had taught him to use. He was ninety-one days into a year that had started with a crystal cracking under his hand and had become something he did not have a word for yet. His left arm was a familiar companion of low-grade ache. His Aether channels were wider than they had been in September and more tired than they had been yesterday and full, right now, of the resonance of six people whose signatures he had been carrying long enough that they felt like part of the landscape of himself.

  He reached for all of them.

  Not five. Six. Every thread, at once, at a volume that the valve could not contain because there was not enough of him available right now to maintain the valve. He reached for Lenne's force and Damar's time and Mira's future-sight and Tobas's structural awareness and Sena's frequency and even Kai — the sliding, almost-absent signature that had never fully resolved under resonance — and he pulled all of it into himself at the same moment and he let it go.

  What happened next, he could not fully account for afterward.

  He knew that the creature stopped. He knew that it was not his force alone that stopped it — it was something more like a resonance field, a projection of all six signatures at once, something that the creature's instruction had not prepared it for and that its own nature, already uncertain about its directive, could not resolve. It did not attack. It did not retreat immediately either. It stood in the west courtyard and trembled at a frequency that Sena described later as confusion, the Void equivalent of a mind trying to hold two contradictory directives simultaneously.

  Then it stepped backward through the tear, which closed behind it.

  Raka was on the ground. He was fairly certain he had fallen rather than sat, but the distinction no longer felt important. His Aether channels were making their displeasure known in terms that were specific and comprehensive and not, he suspected, going to be resolved by rest alone.

  Sena crouched beside him.

  'That was six,' she said.

  'Yes,' he said.

  'Are you alright?'

  He considered the question honestly.

  'Not immediately,' he said. 'But I will be.'

  She looked at him with the composed gravity she brought to things that were serious and real.

  'You reached for me,' she said. 'That is the first time.'

  'It was necessary,' he said.

  'I know,' she said. 'I could feel it. What it felt like from your side.' She paused. 'It felt like all of us at once. It felt complete.'

  He closed his eyes.

  Complete.

  Kai's word. Sena's word now. His word, when he could form one.

  The academy's lights came on around them as the response teams converged on the west courtyard, and Raka sat on the ground in the middle of it all and breathed and counted six signatures in the background hum of his awareness, all distinct, all present, all holding.