“A nest,” I said. “And we’re the exterminators.”

“Splendid,” said Mr. Stab. “When do we start?”

Janissary Jane split us up into the arranged squads, with designated team leaders. Every group had some torced Droods, to lead the charge and, hopefully, soak up some of the initial punishment. She gave us a brief refresher talk on tactics, which basically boiled down to Don’t bunch up. Don’t get separated. Kill everything down there that isn’t us and Destroy that thing they’re building before they can get it working. There were no last-minute questions, no discussions or dropouts. We were all ready for action. Molly called up the spell she’d been working on since we got there, and a great wind arose, picked us all up surprisingly gently, and carried us down the side of the cliff to deposit us safely on the Nazca Plain.

We all started running the moment we hit the ground, heading straight for the towering structure before us. The drones saw us coming and dropped everything to run straight at us, blocking the way with their bodies. Noises came from their distorted mouths, but there was nothing human in the sound. Some had improvised weapons, most just had bare hands, with fingers curled like claws. There was no emotion in their faces, or no emotion we could read, and they bared their teeth like animals. They weren’t even trying to pretend at being human anymore. They saw the armoured forms leading the charge and knew we were Droods.

More of them came running, from every direction. Men, women, children, even some animals. The Loathly Ones aren’t fussy about what they possess. It’s all flesh to them. But even as our first squads slammed into the first wave of drones, even more came swarming out of the single opening at the base of the towering structure. More and more and more of them, far more than the structure should have been able to contain. Instead of the hundreds of drones we’d been expecting, suddenly there were thousands of them. Maybe hundreds of thousands . . . and still more and more came running and howling out onto the plain from the single opening.

The fighting had barely begun, and already we were hopelessly outnumbered. But I couldn’t call for a retreat. I’d committed us to this assault. We had to go on, and we had to win, before the Loathly Ones could open their gateway. Our two forces tore into each other, silver fists beating down inhuman faces, but already a terrible sense of hopeless-ness was seeping through me.

There were just so many of them . . .