She and Pozhar and the Bear burst out of the trees and found themselves beside the great stretch of moonlit water. Vasya’s breath caught in her throat and she slid down the mare’s shoulder.

The horses were grazing where she’d last seen them, near the shore. This time they didn’t run from her but stood, ghostly in the cold mist of early autumn night, raised their flawless heads and looked. Pozhar pricked her ears and called softly to her kin.

The witch’s empty house stood black and still on its tall posts, on the other side of the field. Still a grim ruin, the domovaya asleep once more, perhaps, waiting in her oven. Vasya let herself briefly imagine the house warm with firelight, with laughter, her family close, the horses—a great herd—grazing in the starlight outside.

One day.

But that night, she was there neither for the house, nor for the horses.

“Ded Grib!” she called.

The little chyert, glowing green in the dark, was waiting for her in the shadow of the great oak. He gave a small cry, ran toward her, then halted halfway. Either he was trying to look dignified, or the Bear made him nervous, Vasya could not tell.

   “Thank you, my friend,” Vasya said to him, and bowed. “For asking Pozhar to come to me. You both saved my life.”

Ded Grib looked proud. “I think she likes me,” he confided. “That is why she went. She likes me because we both glow at night.”

Pozhar snorted and shook her mane. Ded Grib added, “Why did you come back? Are you going to stay now? Why is the Eater with you?” The mushroom-spirit looked suddenly fierce. “He is not to kick over any of my mushrooms.”

“That depends,” said the Bear pointedly. “If my brave mistress does not give me something better to do than run to and fro in the dark, I will happily kick over all your mushrooms.”

Ded Grib bristled. “He is not going to touch anything of yours,” said Vasya to Ded Grib, glaring at the Bear. “He is traveling with me now. We came back for you because I need your help.”

“I knew you couldn’t do without me!” cried Ded Grib, triumphantly. “Even if now you have allies that are bigger.” He gave the Bear a very hard look.

“This is going to be a terrible war,” the Bear interjected. “What damage do you expect to do with a mushroom?”

“You’ll see,” said Vasya, and offered her hand to the little mushroom-spirit.

* * *

MAMAI’S ARMY WAS STRUNG out along the Don. The vanguard was already settled at Kulikovo, the reserves encamped in stages for a great distance to the south, ready to march up at first light. Moving softly through Midnight, Vasya and the mare and the two chyerti capped a small rise, and peered through the trees at the host below.

Ded Grib’s eyes grew huge, seeing the scale of the sleeping enemy. His green-glowing limbs quivered. There were fires along the bank as far as the eye could see. “There are so many,” he whispered.

Vasya, surveying the immense stretch of men and horses, said, “We’d best get to work then. But first—”

Pozhar would not take saddle or saddlebag; Vasya had to carry a pouch slung around her instead, annoying when riding fast. From it she withdrew bread and strips of hard smoked meat: Dmitrii’s parting gift. She gnawed a bit herself, and without thinking, tossed some to her two allies.

   Utter silence; she looked up to find Ded Grib holding his bit of bread, looking pleased. But the Bear was staring at her, holding the meat in his hand, not eating.

“An offering?” he said, almost growling. “You have my service; do you want still more of me?”

“Not at present,” said Vasya coldly. “It’s just food.” She gave him a scowl and resumed chewing.

“Why?” he asked.

She had no answer. She hated his wantonness, his cruelty, his laughter, and hated it even more because something of her own nature called out in answer. Perhaps that was why. She could not hate him, for to do so would be to risk hating herself. “You have not betrayed me yet,” said Vasya at last.

“As you say,” said the Bear. But he still sounded puzzled. Holding her gaze, he ate. Then he shook himself and smiled down chillingly at the sleeping encampment, licking his fingers. Vasya, reluctantly, rose and went to join him. “I don’t know about mold, little mushroom,” said the Bear to Ded Grib. “But fear leaps between men like sickness. Their numbers won’t help with that. Come, let us begin.”

Ded Grib gave the Bear a frightened look. He had put his bread away; now he said tremulously to Vasya, “What do you want me to do?”

She brushed the crumbs from her shirt. A little food had restored her, but now a fearful night’s work loomed.

“If you can—blight their bread,” said Vasya, and turned away from the Bear’s grin. “I want them hungry.”

Down they went into the sleeping encampment, foot by foot. Vasya had wrapped rags around the faint shimmer of gold on her arms. Her knife or the Bear’s claws tore the boxes and bags of the army’s food, and where Ded Grib plunged his hands, the flour and meat began to soften and stink.

When Ded Grib seemed to have the idea, she left him and the Bear to creep unseen among the tents of Mamai, spreading terror and rot in their wake. For her part, she slipped down to the river to call the vodianoy of the Don.

   “The chyerti have made an alliance with the Grand Prince of Moscow,” she told him, low. When she had related all her tale, she then persuaded him to raise the river so that the Tatars would not sleep dry.

* * *

THREE NIGHTS LATER THE TATAR army was in disarray along its length, and Vasya hated herself anyway.

“You can’t kill any of them asleep,” she told the Bear, when he sniffed, grinning, at a man who thrashed in the grip of a nightmare. “Even if they can’t see us, it’s not…” She trailed off, with no words for her revulsion. Medved surprised her by shrugging and stepping back.

“Of course not,” he said. “That is not the way. An assassin in the dark can be fought, can be found, and killed. Fear is more potent still, and people fear what they can’t see, and don’t understand. I will show you.”

God help her, he had. Like some foul apprenticeship, she walked with the Bear through the Tatar camp and together they spread terror in their wake. She set fires in wagons and tents, made men scream at half-glimpsed shadows. She terrified their horses, though it hurt her to see them wild-eyed and running.

The girl and the two chyerti traveled from one end of the spread-out force to the other. They gave Mamai and his army no rest. Horses broke their pickets and fled. When the Tatars lit fires, the flames flared up without warning, and sent sparks into unsuspecting faces. The soldiers whispered that they were haunted by a beast, by monsters that glowed, by a ghost-girl with eyes too large in the sharp planes of her face.