“Nadia!” I screamed. She and the Durast leapt from the dish just in time. It toppled on its side in a tremendous crash of breaking glass as the nichevo’ya renewed their attack.

I threw out arc after arc of light.

“Get to the hall!” I cried. “Seal the doors!”

The Grisha ran, but they were not fast enough. I heard a shout and saw the brief flash of Fedyor’s face as he was lifted from his feet and tossed from the roof. I lay down a bright shower of cover, but the nichevo’ya just kept coming. If only we’d had both dishes. If only we’d had a little more time.

Mal was suddenly beside me again, rifle in hand. “It’s no good,” he said. “We have to get out of here.”

I nodded, and we backed toward the stairs as the sky grew dense with writhing shapes. My foot connected with something soft behind me, and I stumbled.

Sergei was huddled against the dome. He held Marie in his arms. She’d been torn open from neck to navel.

“There’s no one left,” he sobbed, tears running down his cheeks. “There’s no one left.” He rocked back and forth, holding Marie tighter. I couldn’t bear to look at her. Silly, giggling Marie with her lovely brown curls.

The nichevo’ya were skittering over the roof, rushing toward us in a black tide.

“Mal, get him up!” I shouted. I slashed out at the throng of shadows rushing toward us.

Mal grabbed Sergei and pulled him away from Marie. He flailed and struggled, but we got him inside and banged the door shut behind us. We half carried, half shoved him down the stairs. On the second flight, we heard the roof door blow open above us. I threw a slicing cut of light high, hoping to hit something other than the staircase, and we tumbled down the final flight.

We threw ourselves into the main hall, and the doors crashed closed behind us as the Grisha rammed the lock into place. There was a loud thud and then another as the nichevo’ya tried to break through the door.

“Alina!” Mal shouted. I turned and saw that the other doors were sealed, but there were still nichevo’ya inside. Zoya and Nadia’s brother were backed against a wall, using Squaller winds to heave tables and chairs and broken bits of furniture at an oncoming pack of shadow soldiers.

I raised my hands, and the light swept forward in sizzling cords, tearing through the nichevo’ya one by one, until they were gone. Zoya dropped her hands, and a samovar fell with a loud clang.

At every door we heard thumping and scraping. The nichevo’ya were clawing at the wood, trying to get in, searching for a crack or gap to seep through. The buzzing and clicking seemed to come from all sides. But the Fabrikators had done their work well. The seals would hold, at least for a little while.

Then I looked around the room. The hall was bathed in blood. The walls were smeared with it, the stone floor was wet with it. There were bodies everywhere, little heaps of purple, red, and blue.