'Where are you?' Shadwell demanded, yelling into the depths of the illusion. 'Show yourself!'

'Don't - ' said Hobart, his voice full of dread.

'This is your DragonI Shadwell said. 'We have to see it.'

Hobart shook his head. The power that had made this place was not one he wanted sight of. Before he could retreat, however, Shadwell had hold of him.

'We meet it together,' he said. 'It's cheated us both.'

Hobart struggled to be free of Shadwell's grip, but his violence ceased as his panicked eyes caught sight of the form that now appeared at the far end of the avenue.

It was as tall as the canopy; twenty-five feet or more, its long, bone-white head brushing the branches, sand-petals spiralling down.

Though it still howled, it lacked a mouth, or indeed any feature on its face but eyes, which it had in terrifying numbers, twin rows of lidless, lashless slits which ran down each side of its head. There were perhaps a hundred eyes in all, but staring an age at it would not have revealed their true number, for the thing, despite its solidity, defied fixing. Were those wheels that moved at its heart, tied with lines of liquid fire to a hundred other geometries which informed the air it occupied? Did innumerable wings beat at its perimeters, and light burn in its bowels, as though it had swallowed stars?

Nothing was certain. In one breath it seemed to be enclosed in a matrix of darting light, like scaffolding struck by lightning; in the next the pattern became flame confetti, which swarmed at its extremities before it was snatched away. One moment, ether; the next, juggernaut.

And then, as suddenly as it had begun, the wail it was unleashing died away.

The Scourge stopped moving.

Shadwell released Hobart, as the stench of shit rose from the man's trousers. Hobart fell to the ground, making small sobbing sounds. Shadwell left him where he lay, as the Scourge's head, mazed in geometries, located the creatures that had trespassed in its garden.

He didn't retreat. What use was retreat? In every direction from this place lay thousands of square miles of wasteland. There was nowhere to run to. All he could do was stand his ground and share with this terror the news he brought.

But before he could utter a word, the sand at his feet began to move. For an instant he thought the Scourge intended to bury him alive, as the ground liquified. But instead the sand drew back like a sheet, and sprawled on the bed below - a few feet from where Shadwell stood - was the corpse of Ibn Talaq. The man was naked, and appalling torments had been visited upon him. Both his hands had been burned from his arms, leaving blackened stumps from which cracked bone protruded. His genitals had been similarly destroyed, and the eyes seared from his head. There was no use pretending the wounds had been delivered after death: his mouth still shaped his dying scream.

Shadwell was revolted, and averted his eyes, but the Scourge had more to show him. The sand moved again, to his right, and another body was uncovered. This time, Jabir, lying on his belly, his buttocks burned down to the bone, his neck broken and his head twisted round so that he stared up at the sky. His mouth was burned out.

'Why?' was the word on Shadwell's lips.

The Scourge's gaze made his bowels ache to empty themselves, but he still delivered the question.

'Why? We mean no harm here.'

The Scourge made no sign that it had even heard the words. Had it perhaps lost the power of communication after an age here in the wilderness, its only response to the pain of being, that howl?

Then - somewhere amid the legion eyes - a skittering light, which was snatched by the burning wheels and spat towards Shadwell. In the breath before it struck him he had time to hope his death would be quick; then the light was on him. The agony of its touch was blinding; at its caress his body folded up beneath him. He struck the ground, his skull ready to split. But death didn't come. Instead the pain dropped away suddenly, and the burning wheel appeared in his mind's eye. The Scourge was in his head, its power circling in his skull.

Then the wheel went out, and in its place a vision, lent him by his possessor: he was floating through the garden; high up in the trees. This is the Scourge's sight, he realized: he was sitting behind its eyes. Their shared gaze caught a motion on the ground below, and moved towards it.

There on the sand was Jabir - naked, and on all fours -with Ibn Talaq impaling him, grunting as he worked his flesh into the boy. To Shadwell's eyes the act looked uncomfortable, but harmless enough. He'd seen worse in his time; done worse, indeed. But it wasn't just sight he was sharing with the Scourge; its thoughts came too: and the creature saw a crime in this rutting, and judged it punishable by death.

Shadwell had seen the results of the Scourge's executions; he had no desire to watch them re-enacted. But he had no choice. The Scourge owned his mind's eye; he was obliged to watch every terrible moment.

Brightness reached down and tore the pair from each other, then scoured out the offending parts - mouth, and eyes, and groin and buttocks - erasing them with fire. It was not quick. They had time to suffer - he heard again the shrieks that had brought him into the garden - and time to beg. But the fire was unforgiving. By the time it had done its work Shadwell was sobbing for it to stop. Finally it did, and a shroud of sand was drawn over the bodies. Only when that was done did the Scourge grant him his own sight back. The ground he lay on - stinking of his vomit - reappeared in front of him.

He lay where he'd fallen, trembling. Only when he was certain he wouldn't collapse did he raise his head and look up at the Scourge.

It had changed shape. No longer a giant, it sat on a hill of sand it had raised beneath itself, its many eyes turned up towards the stars. It had gone from judge and executioner to contemplative in a matter of moments.

Though the images that had filled his head had faded.

Shadwell knew the creature still maintained its presence in his mind. He could feel the barbs of its thought. He was a human fish, and hooked.

It looked away from the sky, and down at him.

Shadwell. . .

He heard his name called, though in its new incarnation the Scourge still lacked a mouth. It needed none of course, when it could dabble in a man's head this way.

I see you, it said. Or rather, that was the thought it placed in Shadwell's head, to which he put words.

I see you. And I know your name.

That's what I want,' Shadwell said. 'I want you to know me. Trust me. Believe me.'

Sentiments like these had been part of his Salesman's spiel for more than half his life; he drew confidence from speaking them.

You're not the first to come here, the Scourge said. Others have come. And gone.

Shadwell knew all too well where they'd gone. He had a momentary glimpse - whether it was at the Scourge's behest or of his own making he couldn't be sure - of the bodies that were buried beneath the sand, their rot wasted on this dead garden. The thought should have made him afraid, but he'd felt all he was going to feel of fear, seeing the executions. Now, he would speak plainly, and hope the truth kept him from death.

'I came here for a reason,' he said.

What reason?

This was the moment. The customer had asked a question and he had to reply to it. No use to try and prevaricate or prettify, in the hope of securing a better sale. The plain truth was all he had to bargain with. On that, the sale was either won or lost. Best to simply state it.

'The Seerkind,' he said.

He felt the barbs in his brain twitch at the name, but there was no further response. The Scourge was silent. Even its wheels seemed to dim, as if at any moment the engine would flicker out.

Then, oh so quietly, it shaped the word in his head.

Seer. Kind.

And with the word came a spasm of energy, like lightning, that erupted in his skull. It was in the substance of the Scourge as well, this lightning. It flickered across the equation of its body. It ran back and forth in its eyes.

Seerkind.

'You know who they are?'

The sand hissed around Shadwell's feet.