That was when the elemental hit him. It felt like being smashed by a giant wave. He heard Tamara yell his name and then he was flying backward, hitting the ground with enough force to send a shock wave through his body. He rolled over, spitting out dirt and grass, and saw the metal elemental looming over him. It looked enormous, as big as the sky its body blotted out. Call struggled to get to his feet, his bad leg wobbling, but fell back into the grass. In the distance, he could see Tamara running toward them, ropes of fire swinging from her hands, but he knew she was too far away to get to him in time. Automotones was already swaying down toward him, its toothy jaws wide.

Call clutched at the dirt, trying to reach into it, to summon up earth magic, but there was no time. He could smell the stink of metal and rust as the elemental opened its mouth to swallow him.

“Stop!”

The elemental jerked its head back. Call swung around to see Aaron standing behind him, his hand outstretched. Shining in his palm was a cloud of oily darkness, spilling upward. The expression on his face was one Call couldn’t remember seeing before. His eyes burned like brands and a grimace pulled his face into something that looked disturbingly like a smile.

The oily black nothingness flew from Aaron’s hand and hurtled straight down Automotones’s throat. For a moment, nothing changed. Then the creature began to vibrate, metal clanking against metal. Call stared. The elemental looked as if it were being crushed by a huge, invisible hand, its metal hide being sucked inward. It opened its mouth and Call saw the oily blackness fuming and bubbling inside it. He realized what was happening. The elemental was collapsing in on itself, each joint and screw, each plate and motor, drawn into the expanding void that Aaron had hurled down its throat.

There was a hand on Call’s shoulder, and Aaron was drawing him up to his feet. The scary expression was gone from Aaron’s face; he just looked grim, watching as Automotones gave a last howl and vanished into a speck of darkness that singed across the air.

“What happens to it?” Jasper asked, running up. “Where is it now? Is it dead?”

Call looked back at the burning building, at the wreckage of cars. He didn’t care where Automotones had gone. The important thing was that they were all safe.

“It’s in the void,” Aaron said, his voice flat. “It won’t come back.”

“Come on,” said Tamara. “We need to get away from the fire.”

They began to make their way back toward the barn, Havoc running ahead of them. The air was filled with smoke, and the glow from the burning fire behind them turned the sky as light as day.

“What we need to do is go back to the Magisterium,” Jasper said breathlessly. “Show them what we found. Call’s dad has been in direct contact with the Enemy’s servants, remember? He’s going to bring them the Alkahest. We need help.”

“We’re not going back to the Magisterium,” Aaron said. His voice was still the same, flat and rigid. Call had the sense that he was holding back whatever he was feeling, tamping it down hard. “They sent that thing after us.”

“After Alastair, you mean,” Tamara corrected. “You don’t believe what that old woman said, do you?”

“Yeah, I do.”

“She’s got no reason to lie,” Call agreed.

Now Aaron’s voice started to crack a little. “If they didn’t send it, why did it attack Mrs. Tisdale? Why did it attack us? It ought to have been given instructions not to hurt us.”

“Maybe they decided that if they couldn’t get us back, it was better to have us dead than in the Enemy’s hands,” said Jasper. They all looked at him in surprise. “It’s the sort of thing the Assembly would do,” he added, with a shrug.