Smoke changed the shape of everything.
It rolled through the kill zones in thick grey-brown clouds, stinking of burned cactus and thorn vine sap and the chemical tang of acid that had shattered against wrong targets. The cloud tree's mist mixed with it, turning the air between the rings into something that looked like soup and sat in the lungs like wet cloth. Soldiers stumbled through in clusters. Visibility dropped to maybe ten feet. Every few seconds someone hit a trip wire or a root runner and went down hard.
The kill zones were working. Not perfectly — nothing worked perfectly once the fighting started — but they did what they'd been designed to do. Bamboo groves on the eastern and western approaches hardened on command, stalks going rigid and dense enough to stop a charging man. The ones who pushed through landed in staggered cattail patches where thick roots grabbed their ankles and held. Ghost plants on the Ent walls flared in the smoke, their pale glow turning the mist into something that looked like the inside of a dying lantern. The disorientation cost the Empire coordination.
Time. That was what Chris was buying. Every minute spent fighting through the kill zones was a minute the siege towers weren't at the walls. Every soldier who went down in the bamboo was one fewer climbing the Ent wall. The math was ugly and simple: bleed them here, bleed them again at the wall, and hope that by the time the heroes came there wasn't enough assault force left for the hammer blow to land.
The Empire kept pushing.
They absorbed the losses and kept coming. That was the part Chris couldn't wrap his head around — sitting on the wall with the Rootmind screaming in his skull, smoke stinging his eyes raw, watching front ranks enter the kill zones, take casualties, and either push through or get pulled back for the next wave. Fresh soldiers replaced the ones who fell. The mages, positioned behind the main advance, were systematically burning through the bamboo and cattails now, clearing paths at a pace Chris couldn't match.
They had the numbers to absorb the cost. Korr had said it. Alister had calculated it. Watching it happen in real time, every plant death registering through the Rootmind as a small flare of something between grief and rage, the understanding settled into Chris's chest like a stone.
A dead soldier lay face-down in one of the cattail patches, half-submerged, shield still strapped to his arm. The cattails had grown through the gaps in his armor, threading between the plates. It was a small thing. It meant nothing. Chris couldn't stop looking at it.
The heroes were still behind the main line.
Through the Rootmind, or rather through the space they occupied, they registered differently from regular soldiers. Heavier footsteps. More deliberate, each one landing with a controlled weight that spoke of power held in check. The handlers moved with them in a tight cluster. Through gaps in the smoke, whenever the wind shifted, Chris caught glimpses — armored figures with something watchful in their posture, keeping the heroes close and contained.
Not yet. They were saving them.
His thoughts kept sliding sideways, refusing to line up. He'd stopped counting the hours. Somewhere behind him someone was vomiting — the dry, heaving kind that came from exhaustion rather than sickness. His hands trembled against the wall no matter how hard he pressed them flat. The Rootmind buzzed at the edges of his awareness, feeding him more information than he could process: a trip wire snapping here, a soldier going down there, a cattail patch gripping an ankle, another releasing. The volume was unsustainable. Something had to give.
The bamboo grove on the western approach triggered early.
The stalks hardened in response to a command he'd meant for the eastern approach. The bamboo locked down around a cluster of soldiers still twenty feet from its effective range. They stumbled, confused, and backed out before it could do real damage. Behind them the mages adjusted their aim. A bolt of fire streaked through the fog and hit the grove while it was hardened and exposed.
The bamboo ignited. The entire western kill zone went up in a rush of flame that turned the fog orange.
"What the hell was that?" Korr was beside him, voice sharp enough to draw blood.
Chris pressed his knuckles against his forehead. The bark ridges bit into his skin. His thoughts were slippery — the kind of mental fog that came from too many hours awake and too much information flooding through a brain that wasn't built for it. He'd meant to trigger the eastern bamboo. The command had routed west.
"Wrong command." The admission came out flat. "Western bamboo triggered early. I was aiming for the eastern."
Korr stared at him. In the orange firelight his red eyes went almost black. His jaw worked, grinding on something he didn't say aloud.
"You need to sleep."
"I can't."
"You can't afford not to." Korr's voice dropped. Above a whisper, meant for Chris alone. "That mistake cost us a kill zone. The next one costs us the wall."
He was right. Being right didn't help. Every time Chris tried to pull his awareness out of the Rootmind, the network dragged him back. The plants needed guidance. Direction. Without him the whole system degraded — the edges going fuzzy, his control weakening as exhaustion ate at his concentration like acid through cloth.
The northern Ent wall took direct mage fire.
The impact doubled Chris over. One hand grabbed the wall for balance as the Rootmind screamed. The Ent itself — the ancient tree-thing that had stood guard for weeks — shuddered under concentrated magical fire. Its bark blackened and split. A section of wall groaned, wood flexing inward, and for one terrible moment the Ent's grip on the earth went loose.
Chris poured everything into it. Nutrients. Will. The full force of his attention pushing through the Rootmind, telling the Ent to hold, to dig deeper, to not let go. The roots clenched against the bedrock and held.
The cost was immediate. His vision swam. His knees buckled. Copper bloomed at the back of his throat.
A hand on his arm. Not Korr. Mira, beside him without him catching it, her face set in that quiet assessing way.
"Breathe."
He breathed. It helped a little.
The northern wall was holding, but barely. Mage fire had scorched a ten-foot section of Ent bark down to the pale wood underneath. Ghost plants wrapped around that section were dead — shriveled, black, their cold glow snuffed. Thorn vine coverage on the north face was thinning fast. Each burst of mage fire stripped another layer. The Ent's pain built in the back of Chris's skull like an infected tooth.
A tipped bucket of water spread across the wall walk. Someone cursed. Nobody stopped to clean it up. A dead cattail had somehow found its way onto the rampart, curled and brittle, and Holt kicked it into the smoke without looking.
Then the Rootmind caught something from the south.
Not demon scouts. The scouts had pulled back hours ago, sitting at the edge of the Rootmind's range where they watched and waited for their opening. This was different. Fast. Organized. Coming from the southeast, across the deep Barrens where nothing moved because nothing lived.
Hooves.
A lot of hooves.
Chris pushed his awareness toward the southern edge of the network, past the cloud tree's mist, past the thorn vine perimeter, out into the dead grey plains where the Rootmind thinned to almost nothing. The vibrations were unmistakable — hundreds of hooves hitting the ground in a coordinated rhythm. The network had learned to distinguish that percussion from marching feet during the Imperial advance.
But the pattern was wrong. Soldiers on horses moved in loose, shifting formations, the animals nervous and inconsistent. This was tighter. Faster. Hooves hitting the ground in near-unison, the way a herd moved when every animal ran in the same direction at the same time.
A dust cloud rose on the southern horizon. Wide. Low. Moving fast. Shapes underneath — dark and too numerous to count.
Korr's head snapped south. His hand went to his sword. Something shifted in his voice — a tone Chris didn't recognize, hadn't heard before. On the wall below, two of Mira's archers lowered their bows, uncertain where to aim. Even Sera had gone still somewhere in the fog, her presence in the Rootmind a fixed point that had stopped moving.
"What in the —"
The first centaur crashed through the southern edge of the Empire's flanking position.
The angle was wrong from the northern wall. Chris couldn't see it. But the Rootmind delivered the impact anyway — a massive body hitting soldiers at full gallop, the shockwave rolling through the ground, the sudden chaos of an entire flank collapsing as something big and fast and completely unexpected tore through it. The Imperial soldiers on the southern perimeter had been positioned to watch for threats from the village, not from the dead plains behind them.
More centaurs followed. Dozens. Then more. They came out of the dust cloud in a wedge formation and hit the Empire's southern flank like a battering ram wrapped in muscle and horseflesh.
The entire southern edge of the Imperial line dissolved.