At the far end of the chamber, a towering shadow detached itself from the dimness beside the oval windows. Steady footsteps brought silence to the room as they crossed the deck plates. With every other footfall there came a heavy metallic report as the base of an iron shaft tapped out the distance. Garro's muscles tensed as the sound made several of the common naval officers back away from the hololith.

In the dusty Terran legends that survived from the histories of nation states like Merica, Old Ursh and Oseania there was the myth of a walker in the darkness who came to claim the freshly dead, a skeletal individual, an incarnation that threshed souls from flesh as keenly as wheat in the fields. These were just stories, though, the speculations of the superstitious and fearful, and yet, here and now, a billion light-years from the birthplace of that folklore, the very mirror of that figure rose into the half-light aboard Endurance, tall and gaunt beneath a cloak as grey as sea-ice.

Mortarion halted and touched the deck plates with the hilt of his manreaper, the scythe as tall as the primarch and a head again. Only the Deathshroud stayed on their feet. Every other person in the room,

human or Astartes, was on his knees. Mortarion's cloak parted as he raised his free hand, palm upwards. 'Rise/ he said.

The primarch's voice was low and firm, at odds with the ashen, hairless face that emerged from the heavy collar surrounding his throat. Wisps of white gas curled from the neck brace of Mortarion's wargear, captured philtres of fumes from the air of Barbaras. Garro caught the scent of them and for an instant his sense memory took him back to the grim, clouded planet with its lethal skies.

The assemblage came to its feet, and still the pri-march dominated the room. Beneath the grey cloak, he was a knight in shining brass and bare steel. The ornamental skull and star device of the Death Guard grimaced out from his breastplate and at his waist, level with the chest of a file Astartes, Garro saw the drum-shaped holster that carried the Lantern, a handcrafted energy pistol of unique Shenlongi design.

Mortarion's only other adornments were a string of globe-shaped censers in brass. These too contained elements from the poisonous high atmosphere of the primarch's adoptive home world. Garro had heard it said that Mortarion would sometimes sample them, like a connoisseur tasting fine wines, or by turns pitch them into battle as grenades to send an enemy choking and dying.

The battle-captain realised he had been holding in his breath and released it as Mortarion's amber eyes took in the room. Silence fell as his lord commander began to speak.

'XENOS.' PYR RAHL made the word into a curse without effort, dramming his fingers across the stubby barrel of his bolter. 'I wonder what colour these will

bleed. White? Purple? Green?' He glanced around and ran a hand through the close-cut hair on his head. 'Come, who'll make a wager with me?'

'No one will, Pyr,' answered Hakur, shaking his head. We're all tired of your trivial gambling.' He threw a glance back to the arming pit where Garro's housecarl was hard at work.

'What currency is there to wager between us, anyway?' added Voyen, joining Hakur at the blade racks. The two veterans were quite unalike in physical aspect, Voyen ample in frame where Hakur was wiry, and yet they were together on most things that affected the squad. 'We're not swabs or soldiers grabbing over scrip and coinage!'

Rahl frowned. 'It's not a game of money, Apothecary, nothing as crude as that. Those things are just a way to keep score. We play for the right to be right.'

Solun Decius, the youngest member of the command squad, came closer, rubbing a towel over his face to wipe away the sweat from his exertions in the sparring cages. He had a hard look to him that seemed out of place on a youth of his age. His eyes were alight with energy barely held in check, enthused by the sudden possibilities of glory that the arrival of the primarch had brought. 'I'll take your wager, if it will quiet you.' Decius glanced at Hakur and Voyen, but his elders gave him no support. 'I'll say red, like the orks.'

Rahl sniffed. White as milk, like the megarachnid.'

You are both wrong.' Prom behind Rahl, his face buried in a data-slate festooned with tactical maps, Tollen Sendek's flat monotone issued out. 'The blood of the jorgall is a dark crimson.' The warrior had a heavy brow and hooded eyes that gave him a permanently sleepy expression.

'And this knowledge is yours how?' demanded Decius.

Sendek waved the data-slate in the air. 'I am well-read, Solun. While you batter your chainsword's teeth blunt in the cages, I study the foe. These dissection texts of the Magos Biologis are fascinating.'

Decius snorted. 'All I need to know is how to kill them. Does your text tell you that, Tollen?'

Sendek gave a heavy nod. 'It does.'

'Well, come, come.' Voyen beckoned the dour Astartes to his feet. 'Don't keep such information to yourself

Sendek sighed and stood, his perpetually morose features lit by the glow of the data-slate's display. He tapped his chest. The jorgall favour mechanical enhancements to improve their physical form. They have some humanoid traits - a head, neck, eyes and mouth - but it appears their brains and central nervous systems are situated not here/ and he tapped his brow, 'but here.' Tollen's hand lay flat on his chest.

'To kill would need a heart shot, then?' Rahl noted, accepting a nod in return.

'Ah/ said Decius, 'like this?' In a flash, the Astartes had spun in place and drawn his bolter. A single round exploded from the muzzle and ripped into the torso of a dormant practice dummy less than a few metres from Garro's arming pit. The captain's house-carl flinched at the sound of the shot, drawing a tut from Hakur.

Decius turned away, amused with himself. Meric Voyen threw Hakur a look. 'Arrogant whelp. I don't understand what the captain sees in him.'

'I once said the same thing about you, Meric'

'Speed and skill are nothing without control/ the Apothecary retorted tersely. 'Displays like that are better suited to fops like the Emperor's Children.'

The other man's words drew a thin smile from Hakur. 'We're all Astartes under the skin, brothers and kindred all.'

Voyen's humour dropped away suddenly. That, my brother, is as much a lie as it is the truth.'

IN THE HOLOLITH cube, the shape of the jorgalli construct became visible. It was a fat cylinder several kilometres long, bulbous at one end with drive clusters, thinning at the other to a stubby prow. Huge petal-shaped vanes coated with shimmering panels emerged from the stern of the thing, catching sunlight and bouncing it through massive windows as big as inland seas.

Mortarion gestured with a finger. 'A cylinder world. This one has twice the mass of the similar constructs found and eliminated in orbits around the planets Tasak Beta and Fallon, but unlike those, our target is the first jorgall craft to be found under power in deep space.' One of the adepts tickled switches with his worm-like mechadendrites and the image receded, revealing a halo of teardrop-shaped ships in close formation nearby.

'A substantial picket fleet travels ahead of the craft. Captain Temeter will lead the engagement to disrupt these ships and break their lines of communication.'

The primarch accepted a salute from Temeter. 'Elements of the First, Second and Seventh Great Companies will stand with me as I take the spear tip into the bottle itself. This battleground is suited to our unique talents. The jorgall breathe a mixture of oxygen and nitrogen with heavy concentrations of chlorine, a weak poison that our lungs will resist with litde effort.'

As if to underline the point, Mortarion sniffed at a puff of gas from his half-mask. 'First Captain Typhon