He returned to the factory he'd adopted as his lair.
He scuttled in the dark and brooded. He vented his anger on the shattered masonry of the ancient building, and when the violence overcame him he peeled off one mighty shoulder-guard and began slowly, precisely, cutting grooves into the exposed flesh of his arm.
It didn't help.
One hundred centuries had passed.
It was the bodies that brought answers, finally.
He had taken them, all twelve, from where they died: dismembered and brutalised, hung high from stanchions in public places and busy roads, emptying their thickening fluids upon the debris below. This was not savagery on his part, nor some crude announcement of territory — but as vital a part of his master's doctrine as was the attack itself.
'Kill a thousand men,' the lesson had run, his master's solemn voice echoing through the warship Vastitas Vi-tris, 'and let no man bear witness. What have you achieved? Who will ever know? Who will ever fear you? Who will ever respect or obey you?
'But kill a single man, and let the world see. Hang him high. Cut him deep. Bleed him dry. And then... Disappear.
'Now. Who will ever know? Everyone. Who will ever fear you? Why, everyone! Who will ever respect you, who will ever obey you? Everyone!
'These humans, their imaginations are strong. Kill a thousand men and they will hate you. Kill a million men and they will queue to face you. But kill a single man and they will see monsters and devils in every shadow. Kill a dozen men and they will scream and wail in the night, and they shall feel not hatred, but fear.
'This is the way of obedience, my sons. They are panicky, gossiping beasts, these humans. It serves us to allow them to be so.'
On the third day, when he had crept through the ductcrawls beneath the local settlements and listened to the villagers' fearful rumours, when two separate posses had ridden out from Spitcreek with furtive eyes and crude weapons to catch the killer, when his fits and rages had exhausted him, there came cautious footfalls into his lair. He watched the invader from above, irritated that his sanctuary should be defiled by such clumsy, thoughtless steps.
The man was dressed strangely, even to Sahaal's eye, sporting a robe of white and red grids. Not some flimsy ragsheet, this, but expensively tailored and elaborately decorated, hung with gold and crystal pendants. Small cables looped delicately through the stitches at the sleeves and collar, and where his flesh showed — pallid and puffy — the wires burrowed into the man's skin, unbroken lines like capillaries. More startling still was his face — what little remained of it — with its near-total coverage by augmetic devices, steel-sheet plating and bristling, spiny sensors. Both eyes were gone, replaced in messy cavities by mismatching bionics, a thick layer of pus and infection marking their boundaries. A duct coiled over his shoulder like unruly hair, and the soft lines of his lips were broken by ragged scars, as if his mouth had once been sealed shut then broken open. Rebreather tubes writhed, hooked into sockets on his chin and neck, like train tracks bisecting his face. Dermis-circuitry patterned his throat, vanishing into the folds of his robes which, on closer inspection, concealed also the hard edges and uncertain outlines of more mechanical devices.
His movements were jerky but precise — like a grounded canary — and Sahaal judged him more machine than man. He would have remained hidden, content to let this unthinking drone remain ignorant of his presence, but for a single detaiclass="underline"
Brandished in one metal-knuckled hand, the man waved before him a sheet of parchment bearing a bold, ink-blotted image, catching at Sahaal's attention and sending adrenaline pounding through his body: a single unbroken spiral, dissected by a jagged stripe. The thief s electoo.
He worked his silent way down towards the intruder without pause, considering his best course of action, fighting excitement. Despite the robe and decoration, the interloper bore all the signs of being little more than some vacuous servitor, obeying whatever simple commands its master had provided. It was therefore with little sense of threat, and a great glut of hope, that Sahaal installed himself in a shadowed recess to watch.
'I know you are there,' the man said, startling him, voice as lifeless as the lens-eyes that regarded him, focused despite the dark. 'I sensed movement before even I entered this place.' The figure twitched its head. 'Your stealth is commendable. Het-het-het-het...'
It took Sahaal a moment to realise that the man's harsh chirruping was his mechanical excuse for laughter, and he bunched his muscles in the shadows, temper ignited. This was hardly the behaviour of a mere servitor.
The man squinted up at him, brows twitching around metal studs. 'I cannot see you well,' he said, lips brandishing their ghoulish smile. 'What are you?'
'I am your death,' Sahaal said, patience expiring, and pounced.
The man was heavier than he had anticipated — his mechanical portions more extensive even than they appeared — but he went down with satisfying ease. Sahaal bowled him to the floor with a single bound, claws pushing hard through flesh and cable, pinning him. The diagram fluttered from his hand, the connections of his shoulder severed.
The man did not scream.
'You will tell me what you know of the thief,' Sahaal growled, voxcaster blending his smooth syntax with dangerous, reptilian tones. 'The filth with the spiral on his skin. Who is he? Where is he?'
The man smiled. With half-metre claws pinioning him to the ground, with razor edges playing across bone and muscle, with a thick paste of blood and servo-oil soaking into his decorous robes, he smiled.
Sahaal twisted the knives.
Het-het-het-het...
Sahaal fought the urge to cut out his tongue.
'My name is Pahvulti,' the man said uninvited, shivering with amusement, eye lenses revolving. 'I think we shall be friends.'
Sahaal almost killed him then, infuriated by the scum's audacity. He jerked a claw free and lashed at his face, ripping across cables and skin. A rebreather tube snickered apart with a hiss and the lens of his left eye shattered, its sutured edges bleeding from fresh sores. Sahaal stopped short — fractionally — of a killing blow, and it required all his effort to force down the rage in his mind.
'The thief!' he bellowed. 'Or you die in pain!'
'I doubt that,' the man said, calm to the point of insanity, 'on two counts. First... I don't believe you foolish enough to kill the one person who recognises the symbol you've been slicing onto all your victims. And second, het-het-het, I don't feel pain. I regard it as an inconvenience I'm better off without.'
Sahaal all but screamed. Did the fool not know how easily he could be crushed? Did he not know what manner of man — what manner of warrior — he directed his insolence towards?
As if reading his thoughts, the worm's one remaining eye twitched across Sahaal's armour, taking in every detail of his colossal form. 'I daresay that painlessness is something to which you can relate,' he grinned. 'Space Marines are notoriously robust.'
Later, in a place so silent that every spoken word was returned to its speaker's ears in a spectrum of glassy echoes, Sahaal folded his arms and fought for calm.
The man-machine Pahvulti had been crucified. With jagged splints of debris forced between the bones of his arms and a tight cord securing his neck to the slumped pillar Sahaal had chosen as his anchor, he should by rights seem a pitiful thing: stripped naked of his robes, bound with chains and barbed cables, slashed and bleeding in a dozen places.