The river hit my legs like a shock as we plunged into it, foaming away from my horse’s broad chest. We kept going. The water climbed up over my knees, over my thighs. My horse had its head held up high, nostrils flaring as its legs beat at the riverbed, surging forward and trying to keep purchase on the bottom.

Somewhere behind me, one of the horses stumbled and lost its footing. It was tumbled over at once and carried into another soldier’s horse. The river swept them away and swallowed them whole. We didn’t stop: there was no way to stop. I groped for a spell, but I couldn’t think of anything: the water was roaring at me, and then they were gone.

Prince Marek sounded another blast from his horn: he and his horse were lurching up on the other side of the river, and he was kicking it onward into the trees. One by one we came up out of the river, dripping wet, and kept going without a pause: all of us crashing through the brush, following the purple blaze of Marek’s light up ahead, following the sound of his calling horn. The trees were whipping by us. The underbrush was lighter on this side of the river, the trunks larger and farther apart. We weren’t riding in a single line anymore: I could see some of the other horses weaving through the trees beside me as we flew, as we fled, running away as much as running towards. I had given up all hope of the reins and just clung to my own horse with my fingers woven into the mane, bent over its neck away from lashing branches. I could see Kasia near me, and the bright flash of the Falcon’s white cloak ahead.

The mare was panting beneath me, shuddering, and I knew she couldn’t last; even strong, trained warhorses would founder, ridden like this after swimming a cold river. “Nen elshayon,” I whispered to her ears, “nen elshayon,” and let her have a little strength, a little warmth. She stretched out her fine head and tossed it, gratefully, and I closed my eyes and tried to widen it to all of them, saying, “Nen elshayine,” pushing out my hand towards Kasia’s horse as though throwing it a line.

I felt that imagined line catch; I flung more of them out, and the horses drew closer together, running more easily again. The Dragon threw a brief look back at me over his shoulder. We kept on, riding behind the blowing horn, and now I started to see something moving through the trees at last. Walkers, many walkers, and they were coming towards us rapidly, all their long stick-legs moving in unison. One of them stretched out a long arm and caught one of the soldiers off his horse, but they were falling behind us, as if they hadn’t expected our pell-mell speed. We burst together through a wall of pines into a vast clearing, the horses leaping to clear a stand of brush, and before us stood a monstrous heart-tree.

The trunk of it was broader than the side of a horse, towering up into an immensity of spreading branches. Its boughs were laden with pale silver-green leaves and small golden fruits with a horrible stink, and beneath the bark looking at us was a human face, overgrown and smoothed out into a mere suggestion, with two hands crossed across the breast like a corpse. Two great roots forked at its feet, and in the hollow between them lay a skeleton, almost swallowed by moss and rotting leaves. A smaller root twisted out through one open eye socket, and grass poked through ribs and scraps of rusted mail. The remains of a shield lay across the body, barely marked with a black double-headed eagle: the royal crest of Rosya.

We pulled up our snorting, heaving horses just short of its branches. Behind me I heard a sudden snapping noise like the door of an oven slamming shut, and at the same moment I was struck by a heavy weight out of nowhere, thrown out of my saddle. I hit the bare ground painfully, the air knocked out of my lungs, my elbow scraped and legs bruised.

I twisted. Kasia was on top of me: she’d knocked me off my horse. I stared up past her. My horse was in the air above us, headless. A monstrous thing like a praying mantis was holding it up in two forelegs. The mantis blended against the heart-tree: narrow golden eyes the same shape as the fruits, and a body of the same silvery green as the leaves. It had bitten the horse’s head off with a single snap, in the same lunging movement. Behind us, another of the soldiers had fallen headless, and a third was screaming, his leg gone, thrashing in the grip of another mantis: there were a dozen of the creatures, coming out of the trees.

Chapter 15

The silver mantis dropped my horse to the ground and spat out the head. Kasia was scrambling up, dragging me away. We were all caught in horror for a moment, and then Prince Marek shouted wordlessly and flung his horn at the head of the silver mantis. He dragged out his sword. “Fall in! Get the wizards behind us!” he roared, and spurred his horse onward, getting between us and the thing, slashing at it. His sword skidded down the carapace, peeling up a long translucent strip as though he’d been paring a carrot.

The warhorses showed they really were worth their weight in silver: they weren’t panicking now, as any ordinary beast would have done, but rearing and lashing out, their voices shrilling. Their hooves struck with hollow thumps against the mantis shells. The soldiers made a loose circle around me and Kasia, the Dragon and the Falcon pulling their horses in on either side of us. All the soldiers were putting their reins in their teeth; half of them had already drawn swords, making a bristling wall of points to protect us, while the others settled their shields on their arms first.

The mantis creatures were coming out of the trees to surround us. They were still hard to see in the dappled light with the trees moving, but no longer invisible. They didn’t move like the walkers, slow and stiff; they ran lightly forward on four legs, the wide spiked jaws of their front legs quivering. “Suitah liekin, suitah lang!” the Falcon was shouting, summoning that blazing white fire he’d used in the tower. He flung it out like a lash to curl around the forelegs of the nearest mantis as it reared up to snatch for another man. He jerked on the line like a man pulling in a resisting calf, and dragged the mantis forward: there was a crackling bitter smell of burning oil where the fire pressed against its shell, thin plumes of white smoke curling away. Off-balance, the mantis snapped its terrible mandibles on thin air. The Falcon pulled its head into the line, and one of the soldiers hacked at its neck.

I didn’t have much hope: in the valley, our ordinary axes and swords and scythes barely scraped the skin of the walkers. But this sword somehow bit deep. Chips of chitin flew into the air, and the man on the other side worked the point of his sword into the joint where the neck met the head. He put his weight against the hilt and shoved it through. The mantis’s shell cracked loudly like a crab’s leg, and its head sagged, the jaws going limp. Ichor oozed out of its body over the sword-blade, steaming, and I briefly saw letters gleam golden through the haze before they faded again into the steel.