The centaur scout came back wrong.
Korr's first thought when Windmane rode through the gate at a gallop. One of the elder's best long-range riders, young mare, running patrols since the battle. Her flanks slick with sweat. Her coat dusted green — grass stains, pollen, the fine powder of crushed leaves clinging to her hooves and flanks and the underside of her tail. She'd been riding through growth. Actual growth. The kind with water and soil and everything the Barrens was supposed to lack.
"Three days east." Her voice was raw from hard riding. "Past the grey flats, past the dead canyon, past everything I assumed was dead. Grass, Korr. Not patches. Fields. Wildflowers. Saplings pushing up through rock I've ridden over a dozen times and never seen anything."
She pulled a branch from her saddlebag. Young cedar, maybe six inches, needles soft and pale green. "Found this in a crack in a boulder. Grey rock, nothing else. Flowers at the base. Yellow ones."
Korr took it. Cool and damp. Sharp scent of new growth. He turned it over. Nothing wrong with it.
"Spread," he said.
"Everywhere the further east I went. I didn't push past three days — growth too thick for safe riding." She paused. "The soil, though. Where it's reached, the soil is black."
Korr tucked the branch into his belt. "Report to the elder. Then eat."
"Yeah." She was too tired for more than that. She rode toward the centaur encampment, green dust falling from her mane.
The shaman took most of the day. She walked the perimeter with her hands in the soil, and when she came back to Korr she was slower than usual, like the walking itself had cost her something.
"Five miles. Maybe six. Outer roots are hair-fine but alive. And there are seeds — dormant seeds in the Barrens soil that haven't sprouted in centuries. The network is waking them up."
"Has it reached the trade routes?"
"The eastern route. Part of it." She settled onto her haunches, which she did when she had a lot to say and didn't want to stand while saying it. "I need to tell you something about what this means, and you're not going to like it."
"Tell me anyway."
"The Barrens cover a third of the continent. Right now that's a barrier — natural terrain keeping the empires from each other's throats. If this keeps going — and I see no reason it would stop — that barrier disappears. Every border becomes something worth fighting over. Every treaty and ceasefire that's kept things stable for the last century—" She shifted her weight, one hoof scraping the dirt. "I don't know how fast. The growth feeds itself. More roots, more soil change, more growth. But we're talking about changes that redraw the map."
"You're telling me this tree is going to start a war."
"I'm telling you it already has. The empires just don't know it yet."
Korr was quiet for a while. A dog barked twice somewhere behind them and stopped.
"We can't defend six miles."
"No. You can't."
Something was different and Chris couldn't name it.
He'd been aware of the network's edges for weeks — the slow creep of root tips into grey soil, the gradual thickening of connections near the trunk. This was bigger. The edge had moved overnight, or what felt like overnight, pushed out in every direction by something that didn't feel like growth and didn't feel like intention and didn't feel like anything he had a word for. New threads appearing in his awareness faster than he could count them. Each one a point of contact with soil he'd never touched, and the sensation was — not pain, not pleasure — something his human mind had no category for. Like trying to describe color to something that had only ever known temperature. Iron-rich clay two miles south, and the weight of a fox crossing a root in the grey flats, and water moving through cracks in stone a mile underground, and a taste that might have been salt or might have been minerals or might have been nothing, gone before he could hold it, and then another thread and another and another — the shaman's framework held the center together but the edges were fraying and he tried to focus on a single root tip pushing into new soil and held it for four seconds before the rest crashed back in. Four seconds. Better than three.
Korr and Sera stood on the northern wall at dusk. Below, Mira was checking wall positions with the kind of methodical attention that made other people look incompetent by comparison. She counted things. Measured things. Wrote numbers on bark with charcoal and compared them to last week's numbers and frowned when they didn't match. Watching her work was like watching a clock — predictable, relentless, and slightly unsettling if you stared too long.
"Six miles is three times what we planned for," Sera said.
"Vines cover most of it."
"Vines can't tell us what they saw."
"No."
They watched Mira work for a minute. She crouched at the base of the eastern wall and studied something near the foundation stones. Straightened. Didn't pick it up. Walked on.
"The imperial probe," Sera said. "Seventeen days. Maybe less. If they scout the perimeter and find it's tripled—"
"Let them find it."
"Or it reads as overextension. Either way they report back, and someone smarter than whoever's riding out here makes a decision." Sera turned to him. "We need to talk about what happens if they don't just scout."
"Then we fight them. Same as last time."
"Last time we had a tree that could think. If Chris can't keep up with the expansion—"
"Then we fight them without it. Same as every village that's ever been attacked." Korr pushed off the wall. "Talk to the shaman. Find out how much time we have before the gap between Chris and the network becomes a problem. I'll talk to Mira about the perimeter."
Sera raised an eyebrow. "You're going to talk to Mira about perimeter defense while standing on a wall that's three times too long?"
"I'm going to ask her what she'd do about it. She's the only person here who's actually good at this."
Sera said nothing for a moment. Then: "She found something."
"What?"
"By the wall. She looked at something and didn't pick it up. Mira picks everything up. She's been cataloging plant growth since the battle — type, location, rate. If she didn't pick it up, it's because she was deciding whether to tell you about it."
Korr looked down at the wall. Mira was already out of sight, around the corner of the eastern section.
"Go ask her," Sera said. "Then come find me."