The shoulder healed faster than it had any right to, which Eric found more troubling than reassuring.

*"This isn't normal tissue regeneration,"* he said, on the third morning, as Vane flexed the arm experimentally and found, to his own surprise, barely a twinge where three days ago there had been a wound deep enough to see bone. *"I cleaned it, I closed what I could from the inside, but this rate of healing isn't something I did. Something about the Aegis-Cor bond seems to be accelerating your recovery beyond what either of us should expect."*

"Is that a problem?"

*"I don't know yet. It could mean the bond is stabilizing in ways that benefit you. It could also mean it's drawing resources from somewhere I haven't identified to pay for that healing, and I'd rather understand the mechanism before I start trusting it blindly."* A pause, dry despite the caution underneath it. *"I'm a cardiothoracic surgeon, not a theoretical magician. I don't have a textbook for this."*

"Welcome to Astoria," Vane said, testing the shoulder again, rolling it through its full range without so much as a flicker of pain. "Nothing here comes with a textbook."

*"Clearly. I've had to write my own as I go, and my handwriting was never good even before I lost the hand to write with."*

Vane laughed — an easy, unguarded sound that had become, in the space of barely two weeks, disturbingly familiar to produce. Marek, passing the tent on some errand or another, gave him a long, considering look through the open flap, and said nothing, and kept walking, which was, Vane had learned, Marek's particular way of saying *I see you and I am choosing not to ask.*

Vane found, turning his arm once more through its full range just to reassure himself the miracle of it was real, that he did not entirely mind being watched that way. Marek's silences had always carried more weight than most men's speeches, and this one, Vane suspected, carried something almost like approval — though approval of what, exactly, neither of them had yet found the words to name aloud.

*"He's not wrong to wonder,"* Eric said, once Marek was well out of earshot. *"You've been different since the ridge. Anyone who's known you as long as he has would notice."*

"Different how?"

*"Lighter,"* Eric said, after a moment's consideration, as though weighing the word carefully before offering it. *"Not less serious. Not less of a soldier. Just — lighter. Like something that used to weigh on you every hour of every day has finally been given somewhere else to sit for a while."*

Vane considered that in silence, watching the frost-rimmed edge of the training yard glitter faintly in the early light. It was, he thought, an uncomfortably accurate description of a change he hadn't fully admitted to noticing in himself.

---

Word came from the capital four days later: the Chancellery had accepted the report, for now, with the customary bureaucratic caveat that a formal observer would be dispatched before the spring thaw to conduct an in-person assessment of "the artifact's continued stability." It was, by Imperial standards, a generous reprieve — months, not weeks — and Vane found himself almost disappointed by how little relief it brought him.

*"They're not letting it go,"* Eric said, once Vane had read the letter twice through. *"They're just letting it wait."*

"That's the Empire's version of patience. It's never mercy. It's only ever timing."

*"Then we use the time. Whatever we need to understand about this bond, about what I am, about how to keep both of us alive when someone eventually does come asking harder questions than a letter can carry — we use every day between now and spring to prepare for it."*

"You sound like a man building a fortification."

*"I've built a few, in my own way. Contingency plans for surgeries that could go wrong in four different directions before I even made the first incision. This isn't so different — figure out where the danger's likely to come from, shore up every weakness you can find before it arrives, and hope you've done enough when it finally does."*

"And if we haven't?"

*"Then we improvise. The same way I did the first night, with a heart I'd never seen before and no idea what I actually was. We've survived worse odds than a bureaucrat with a clipboard."*

Vane found himself smiling, despite the weight of the letter still sitting on his desk. "That's a low bar for reassurance."

*"It's the only bar I've got at the moment. I'm working with what's available."*

Vane folded the letter and set it, as he had the first one, on the corner of the desk where he could see it without looking at it directly. "You say 'we' so easily now."

*"You noticed."*

"I notice everything about you now. It seems to be a side effect of the arrangement."

There was a pause, warmer than the words themselves probably warranted, and when Eric spoke again there was something almost shy threaded through the clinical steadiness of his voice, an unfamiliar register Vane hadn't heard from him before. *"I notice everything about you too,"* he admitted. *"Your heart rate. Your sleep patterns. The exact cadence of your breathing when you're about to say something you don't want to say. I used to think that kind of attention was just good medicine. I'm not sure that's the whole explanation anymore."*

Vane went very still, the words landing somewhere low and unguarded in his chest, in the ordinary, mortal part of it that had nothing to do with crystal or magic. "What is the explanation, then?"

*"I don't know yet,"* Eric said, quiet, honest. *"I'm a doctor. I'm used to having answers. This is the first time in longer than I can remember that I don't, and instead of finding that unbearable, I find I don't mind waiting to figure it out. Slowly. With you."*

---

They fell, over the following days, into something that might almost have passed for routine, if routine could ever properly describe a life spent half-inside another person's chest. Mornings began with Eric's assessment of Vane's vitals, delivered now with less clinical distance and more of the easy, familiar banter of two people who had learned each other's rhythms. Afternoons were drills, correspondence, the endless small administrations of holding a frontier together. Evenings, more often than not, ended with Vane sitting quietly by whatever fire was available, talking to a voice in his chest about nothing in particular — old campaigns, half-remembered jokes from Eric's abandoned world, the small griefs and small joys that made up a life, any life, in either world.

It was during one such evening, the fire burned low and the camp settled into its nightly quiet, that Vane first noticed the sensation Eric had warned him, weeks ago, might eventually surface — the strange bleed-through of the Bio-Resonance that let each of them feel, faintly, what the other felt.

He was tired, bone-deep tired in the particular way that came after a long day of drills followed by an even longer evening of correspondence, and as he sat with his eyes closed, letting the fire's warmth soak into muscles that had earned the rest, he became aware, gradually, of something that was not quite his own exhaustion. A different texture to it. Something that felt, unmistakably, like relief — quiet, private, almost tender — radiating from somewhere behind his own ribs that had nothing to do with his own tiredness at all.

"You're feeling something," he said, quietly. "Right now. I can tell."

There was a pause, longer than usual, and when Eric spoke again his voice had lost some of its careful composure. *"You're not supposed to be able to sense that yet. The bond's not meant to run both directions this early."*

"And yet."

*"And yet,"* Eric agreed, something almost rueful in it. *"I was thinking about how strange it is, that after everything — the reports, the politics, the constant threat of Bloodburst and Bureaucracy alike — this is somehow the easiest part of my existence right now. Sitting here. With you. Not being needed for anything except exactly this."*

Vane's hand came up, unbidden, to rest over his heart, the gesture so habitual now it barely registered as deliberate anymore. "That doesn't sound like nothing to me."

*"No,"* Eric said, quiet, and something in the admission felt like a door left open rather than fully walked through. *"I don't suppose it does."*

Vane let the silence stretch, comfortable now in a way silence had rarely been before Eric, and found himself wondering, not for the first time, what Eric had looked like — whether he'd had a gentle face to match that gentler register of his voice, whether he'd smiled easily or rarely, whether there had been anyone in that other world who'd known him well enough to notice the difference. He did not ask. Some questions, he was learning, were better offered room to arrive on their own, in their own time, rather than dragged forward before either of them was ready.

The fire popped, sending a brief shower of sparks up into the dark, and Vane watched them rise and fade without really seeing them, caught instead in the strange, warm weight of feeling someone else's contentment settle over his own like a second skin. It was, he thought, the closest thing to peace he had felt in years — not the peace of danger passed, which he knew intimately and distrusted on principle, but the peace of simply being, for once, exactly where he wanted to be.

---

The observer's letter had mentioned spring, which gave them months, and months, Vane reasoned, were enough time to learn a great deal — about the bond, about the strange accelerated healing, about whatever quiet, uncharted thing was growing steadily larger in the space between a Marshal who had spent a decade learning not to want anything and a doctor who had spent two decades giving everything away. It was not, he told himself, more than that. Not yet. He was cautious by nature and had learned, the hard way, exactly what it cost to want things too loudly in a life like his.

But that night, lying awake long after Eric had gone quiet in the particular way that Vane was learning meant something like sleep, or its closest available equivalent, Vane found himself turning the shape of the last two weeks over in his mind — the voice that had saved his life, the doctor who noticed things no one else in his life had ever bothered to notice, the strange, growing certainty that whatever this was becoming, he did not want it to stop.

"Eric," he said, quiet, into the dark, not truly expecting an answer.

*"Mm,"* came the reply anyway, soft with something that might have been the beginning of sleep, or might simply have been the particular unguarded honesty that came easiest in the hour before dawn. *"What is it?"*

"Nothing," Vane said. "Just — thank you. For staying."

*"Where else would I be,"* Eric murmured, and it wasn't quite a question, and Vane let it settle over him like the last of the fire's warmth, and slept, finally, with his hand still resting over the place where two hearts had somehow, against every reasonable expectation, learned to beat as one.

He dreamed, that night, of a white room he had never seen and would have had no way of describing, full of quiet voices and the steady rhythm of a machine keeping some kind of count, and somewhere in the dream a woman's laugh rang out, warm and familiar in a way that had nothing to do with anyone Vane had ever known — and he understood, waking briefly near dawn, that the dream had not been his to have at all, and found, strangely, that he did not mind carrying it anyway.

---

Morning brought its own reminder that peace on the Abyssal Frontier was always, at best, a borrowed thing. A rider arrived before dawn, exhausted, her horse lathered from a hard night's ride, carrying word of a second rift — larger than the first, opening not at the border proper but disturbingly close to a garrison town that had never before needed to fear the Abyss reaching quite so far. The rider herself, a young courier named Isolde who had ridden the northern roads for three years without ever once carrying news this grim, delivered her report standing at rigid attention, voice steady despite the exhaustion plain on her face, and Vane found himself, even in the scramble of preparation, sparing a moment to notice the discipline it took to hold a report together under that kind of fear.

"Get her fed and a fresh horse," he told the nearest officer, before the courier had even finished speaking. "She's earned that much before she rides anywhere else today."

Isolde's shoulders dropped a fraction at that, some of the rigid formality easing out of her posture, and she gave Vane a quick, grateful nod before allowing herself to be led toward the mess tent. It was a small thing, Vane knew — a hot meal, a moment's rest before the next demand — but small things were often the only currency a Marshal had to spend on the people who kept his frontier running, and he had learned long ago never to spend it carelessly. It cost him nothing to notice, and it had, over the years, bought him a kind of loyalty no amount of rank or reputation ever could.

*"You do that a lot,"* Eric observed, quietly, once the courier was out of earshot. *"Notice the small things people need before they ask for them."*

"It's cheaper than losing them later."

*"That's not why you do it, though. Not really."*

Vane didn't answer, mostly because he suspected Eric was right, and there was no version of the truth that wouldn't have sounded, out loud, uncomfortably close to tenderness — a quality he had spent years training himself not to display where anyone might use it against him.

Vane was already dressing before the rider had finished her report, the easy warmth of the previous night folding itself back into the familiar, practiced calm of a Marshal preparing for war. Somewhere in the back of his mind, distant but present, he registered the loss of that warmth almost as a physical thing — a fire banked too quickly, a door closing on a room he'd only just begun to feel welcome in — and set it aside, the way he had learned to set aside everything that wasn't immediately useful to the fight ahead.

*"Heart rate's climbing,"* Eric observed, quiet and steady, already settling back into the rhythm of a partnership that had, in barely two weeks, become as natural to both of them as breathing. *"I've got you."*

"Two rifts in a month," Vane said, buckling his sword belt with quick, efficient hands. "That's not ordinary. Something's destabilizing the border faster than it should."

*"Faster than natural causes would explain?"*

"That's what worries me. The Abyss doesn't usually escalate this quickly without a reason. Either something out there is pushing harder than usual, or something in here—" he tapped two fingers against the map spread across his desk, indicating the garrison town circled in fading ink "—is weakening the barriers that are supposed to hold. Neither answer is one I like."

He rolled the map and tucked it beneath his arm, already calculating supply lines and marching order in the efficient, half-conscious way that had become second nature over eight years of exactly this kind of morning. Whatever answer waited for them at that second rift, he intended to have it before the week was out, whatever it cost him to find it.

*"You think it's connected to us. To me."*

"I think it's too early to say," Vane admitted, "and too dangerous to assume it isn't."

*"Then we find out together,"* Eric said, quiet and certain.

"I know," Vane said, and meant it in a way that went far beyond the words themselves, and reached for his sword, and did not, for the first time in longer than he could remember, feel entirely alone in reaching for it — not with a second, steady heartbeat keeping pace beside his own, all the way to whatever waited for them at the edge of the world.

Outside, the camp was already stirring into motion — horses saddled, companies forming, the particular controlled urgency of men who had done this too many times to panic but not so many times that the weight of it had worn away entirely. Vane strapped on his armor with quick, practiced hands, the ache in his healed shoulder nothing more now than a distant memory of a wound, and felt Eric settle into the familiar rhythm of readiness alongside him — vigilant, steady, present in a way that had become, in the space of two short weeks, as essential to facing a battlefield as the sword in his hand.

"Whatever's waiting at that rift," Vane said, low, mostly to himself, "we'll meet it the way we met the last one."

*"Together,"* Eric said again, and this time there was no hesitation in it at all — only certainty, quiet and complete, the kind Vane had not felt from anyone, about anything, in longer than he cared to measure. Whatever waited for them past the frontier's edge, he thought, they would meet it as exactly that — together, or not at all.

He swung up onto his horse, gathered the reins, and rode out to meet whatever the Abyss had sent this time, no longer entirely his own man alone against the dark, but something new now, something neither of them had a proper name for yet — two lives, two hearts, one fragile and stubborn thread of trust holding steady between them against everything the Empire, and the Abyss, and the whole uncaring world beyond the frontier's edge, might yet try to tear apart.