Before now, the Lord of the Unfleshed had been aware of them as a glimmering presence on the edge of perception, but he saw they were gathering now, drawn to this place of death by the arrival of the Iron Men's machine.

Uriel and his companion had not seen these presences, or even been aware of them, but the dreadful energies washing from the terrifying machine had found common cause in the forgotten streets of the dead city, drawing back those that had once called it home and filling them with borrowed power.

He had kept the tribe away from the gathering strength of their unquenchable rage, knowing on some marrow-deep level that to disturb the pool of anger and pain would be to invite disaster.

As though his observation had given the lights notice of their presence, the Lord of the Unfleshed saw them drifting through the streets towards the metal barrier that surrounded the city. Where such a barrier would prevent creatures of flesh and blood from egress, it provided no such impediment to these beings of light and rage.

They came towards the mountains and the tribe feasting at the mouth of the cave.

The tribe felt them come, baring their fangs and unsheathing their claws.

The Lord of the Unfleshed stood and watched the approach of the light. He did not fear them, for the world of the Black Sun had vomited horrors worse than them from its smoky depths.

The tribe retreated within the cave and the Lord of the Unfleshed stood protectively before them, resplendent and magnificent in his new suit of skin. He felt the burning rage at the core of these strange beings of light, but more than that he sensed their hunger and their desire to wreak harm on those who had wronged them.

As he watched them approach, the mouth-watering flavour of burned flesh arose in the back of his mouth with the forgotten taste of human meat. He moaned and thick saliva gathered in the folds of his jaw.

He shook his head.

Uriel had forbidden them to taste the rich flesh of humans and drink their warm blood.

The Emperor did not want them to eat His subjects.

Behind him, the tribe grunted and worked their fanged mouths as the smell of cooked flesh filled the cave and they too recalled the taste of human meat. The smell was overwhelming and the Lord of the Unfleshed struggled to keep his mind on the approaching beings.

Without seeming to move, they gathered at the cave mouth, a jostling cascade of ghostly, heart-lit shapes. He saw the suggestion of human forms in their depths, men, women and children who looked upon him with expressions that ranged from pity to anticipation.

Their faces were blackened and burned, the flesh seared from bodies, and the Lord of the Unfleshed felt their pain, an eternal agony that could only be ended one way. He knew that these were no living things, but dead things that should not be.

They surged into the cave towards the Unfleshed, but instead of death they craved life.

The Lord of the Unfleshed felt the dead wash over him like a tide, a tumbling cascade of thousands of lives. The cave filled with light, burning, all-consuming light. It pressed against him, oozing into his body by some unknown process of osmosis.

A million thoughts, like a swarm of angry insects, roared in his head and his hands flew to his skull at the deafening noise. Thousands of voices echoed within him, each one clamouring to be heard over the others, each one begging, pleading and demanding to speak.

Pain filled him as he felt his body burning, the blood boiling in his veins, the meat of his body searing and his bones cracking in the fire. The walls of the cave seemed to twist and melt, as though fading away, only to be replaced by walls raised by human hands and cast down by the artifice of man's war machines.

Instead of rock above his head, he saw sky, clear skies filled with cruciform shapes shedding iron canisters that descended on vapour trails and exploded in sheets of white-hot flame. Fire surrounded him, leaping and dancing like a living thing as it consumed everything around it with gleeful abandon.

He knew he was seeing their deaths, these beings of light and anger, but could not force the images from his mind. He heard screaming: deafening, heart-rending screaming.

'No!' bellowed the Lord of the Unfleshed. 'Get out of my head!'

He heard the terrified roars and cries of the tribe and surged to his feet, clawing at the new skin that clothed his face. Yellow talons tore great gouges in his cheeks and the pain was welcome for it was pain. Flaps of sliced skin hung down from his face and fresh blood pattered on the floor of the cave.

His limbs rippled with unnatural motion, convulsing and swelling with the presences that poured into him. His every muscle, fibre and cell was suffused with the energy and fury of the dead.

Only the pain remained his and he clasped his claws across his heart, tearing outwards in an upward fan, scoring a series of bloody grooves across his chest like the wings of an agonised, screaming eagle.

The Lord of the Unfleshed dropped to his knees with his clawed arms upraised as the dead of Khaturian filled him, pressing the last remnants of his pain and fear into a creaking corner of his cranium.

Instead of his own pain, he felt the entirety of theirs.

Their rage and their fury were his.

Only one thing could end it: death.

Uriel awoke from a deep slumber, surprised that he had fallen asleep with such ease and that his dreams had been untroubled by visions of blood and death. He had been so long away from the real world that he had quite forgotten what it was to sleep without fear of such things.

Pasanius slept soundly on the bed across the room, his eyes darting beneath his lids. Uriel frowned as a snatched fragment of the dream he had been having returned to him.

He had seen a cave and something bright and malevolent that had emerged from its depths. Uriel could not make out its shape or identity, but he knew that whatever it was, it had been something unutterably dreadful. He shook off the last vestiges of the dream and swung his legs from the bed.

As quietly as he was able, he poured a goblet of water and rinsed his mouth. He tasted ashes and a metallic flavour that reminded him of blood. He caught the tang of something burning nearby and wondered if the quarters they had been assigned were near a kitchen or mess hall.

Uriel rubbed the heels of his palms against his eyes, frowning at the sluggishness that seemed to afflict his limbs and thought processes. A Space Marine could normally go from sleep to wakefulness in the time it took to draw breath, but ever since arriving on Salinas he had felt a lethargy that seemed to leech his vitality.

Perhaps that explained the perpetually downcast faces he had seen on the streets and among the Falcatas. This was a grim world, but perhaps the melancholy he felt ran through the very fabric of the world and its inhabitants.

Pasanius stirred on his bed and sat up, reaching up to rub his scalp, a scalp that was now shaggier than it had been in a long time. Both arms came up, but only the left was able to make contact with his head.

'Damn, but I can't get used to that,' said Pasanius, looking at the red stump of his right arm. 'I hated it when I had that xeno-tainted arm and now I miss it. How's that for perverse?'

'It's only natural, I suppose,' said Uriel. 'I heard that some men who lose a limb claim they can still feel it itching, as though it's still part of them.'

'Who did you hear that from?'

'It was back on Tarsis Ultra,' explained Uriel. 'Magos Locard told me of an ancient Adept of Mars by the name of Semyon who developed a whole slew of new forms of augmetic implantation. It seemed this Semyon claimed to be able to produce electrographic images of subjects that showed their limbs still in place, even after they had been surgically removed.'