‘How quickly the tide turns.’ Corswain was grinning bloodily behind his helm now. The shadows vanished. Sevatar and Sheng fled as abruptly as they’d descended.

Rattling like hailstones, more drop-pods fell from above. Some were blackened by allegiance, others by the atmospheric fire. Both fleets in orbit disgorged warriors onto the surface, even as they were surely battling in the void. Here on the ground, Corswain could barely see anything at all. He heard the Legions meeting in the skidding clashes of chainblades on ceramite, and the insistent crash of bolters, but saw precious little. With the hand that still obeyed him, he dragged his helmet off, wincing as the cold night air hit his savaged face.

The Lion was in similar ruin, surrounded by his black-clad warriors. Blood sheeted down the back of his head, a liquid cloak down his shoulders. Corswain had no idea how he still lived with so little of his skull intact.

Curze laughed – at least, he began to – before his own warriors began to drag him back just as the Angels dragged the Lion. The two primarchs staggered back from one another, cursing each other above their sons’ heads, both hindered by weakened limbs and grievous wounds that made the air stink with their genetically divine blood.

The great sword impaled the ground as it fell from the Angel Lord’s grip, while Curze could no longer lift his claws.

Corswain felt himself sliding back down to the ground despite his attempt at moving to the primarch’s side. Strong hands pulled at him, hauling him up, forcing him to do what his muscles wouldn’t allow. He turned his head, seeing with his good eye.

‘Alajos,’ he said.

‘The captain is dead, Your Grace. It is I, Sergeant Tragan.’

‘Sevatar is here. Watch for him. He is here, I swear it. He killed Alajos. I saw it happen.’

‘Yes, Your Grace. Come… this way. Thunderhawks are inbound.’ Across the vox, he yelled to every surviving soul, ‘First Legion, fall back!’

Corswain limped in his brother’s arms, vaguely wondering if he was dying. It felt like it, though never having died before, it was a guess.

‘You’re not dying, Your Grace,’ Sergeant Tragan laughed now. Corswain hadn’t realised he was murmuring out loud.

His last vision was of the primarchs, both near driven to their knees, surrounded by growing phalanxes of their armoured sons. Curze reached his claws for the Lion, snarling and cursing, too weak to resist his Legion dragging him from the field. The Lion’s reaction was a foul mirror, made all the more hideous because of the warlord’s majesty. He screamed oaths from his bleeding, angelic face, pulled back from the battle by his own sons.

Above the battle, he heard Sevatar’s cry. ‘Death to the False Emperor! Death to his Angels in Black!’His skin crawled in the wake of those words. Such conviction. Such hate.

‘The Thramas Crusade,’ Corswain sighed. ‘They are right, all of them. This war is just beginning.’

‘Your Grace?’

‘My sword,’ Corswain reached a hand out, as if he could touch the opposing groups of warriors.

‘Where is it, Your Grace?’

‘Gone,’ Corswain closed his remaining eye. ‘I left it in a primarch’s spine.’

XVII

THE BEAST NEVER dies in his dreams.

He watches it slink through the trees, keeping its sinuous body low to the ground, its movements fluid enough to be sickening and boneless. Its ears rake back flat against its head, while its clawed paws are silent on the deep snow. The creature hunts, eager but passionless, its dead cat’s eyes glinting with emotionless hunger.

The boy takes the shot, and the shell goes wide.

With the cold air split by the crack of gunfire, the beast twists in the snow, ghost-light on the ground as it snarls at its attacker. Quivering black spines rise from the denser white fur at its back and neck, an instinctive defensive response. A tail lashes behind the beast in threatening rhythm, coiling and thrashing in time with the boy’s own heartbeat.

For a moment he sees what the elder knights all claimed to see – a sight he’d always believed to be the lies of ageing warriors girding their fading legends with false poetry.

Yet there it is in the beast’s black eyes, something beneath the raw desire to survive. Recognition stares back at him: a crude intelligence, malicious despite its feral simplicity. The moment shatters as the creature vents its anger. Something between a lion’s burbling snarl and a bear’s hoarse roar rings out in the cold air between them.

The boy fires again. Three more shots echo through the forest, disturbing the snow bundled on branches above. Shivering fingers seek to reload the primitive pistol, but his aim was true and his father’s pistol sang its killing song. The beast limps now, dragging itself closer in a grotesque, mangled run.

He feels the chunky shells scatter from his grip, spilling out onto the snow. It’s too cold to reload with his fingers numbed to raw senselessness. He drops the pistol, too. Not from fear or pain, but because he needs two hands for what will come next.

Steel whispers as it slides from his sheath, a sword almost as long as the boy is tall, clutched in two shivering hands. As the beast stalks closer, he sees the malign hunger in its eyes cool to a feral wariness. It’s dying, but that only makes it bolder. Its foul sentience knows it no longer has anything to lose. It hunts now out of malice alone.

Flakes of snow drift onto the blade, freezing into diamonds wedded to the steel.

‘Come on,’ the boy breathes the whispered words. ‘Come on…’

The beast leaps, striking his chest with the force of a stallion’s kick, and he’s down on his back. The beast weighs as much as a warhorse, its twitching bulk pressing down on the boy’s slender body. The ache in his chest is a dull, creaking crackle, as if his lungs are filled with dry leaves. He knows his ribs are shattered, but there’s almost no pain at all. Steaming blood courses down the blade and onto his hands.

Finally, the beast ceases its shaking. The boy gathers his strength and counts to three, rolling the stinking creature onto its side. The spines still quiver and leak clear fluid. He’s careful not to touch those.

The sword in his hands is bonded to his fingers by a coating of the beast’s cooling blood. He lets the blade fall into the snow, and draws the serrated skinning knife from his boot. Birds sing in the branches above, though birdsong on Caliban is never beautiful. Raptors cry challenges at one another, while carrion birds caw for corpse-meat.

Slowly, everything starts to whiten, to fade away as other, truer sounds begin infiltrating his thoughts: the sound of a ticking fan blade in a labouring air filtrator; boot-steps on the deck above; the omnipresent rumble of live engines.

At last, he opens his eyes.

Both of them. Both work. He looks at the harsh illumination globes above, smelling the sharp disinfectant smell of the medicae chambers.

With a pained grunt, Corswain rises and says, ‘Water.’

XVIII

HIS MIND WANDERED during the morning vigil. As Corswain knelt with his brothers, his muscles still stiff with aches and discoloured by bruises, he found the serenity of purposes ever more difficult to attain. His head remained bowed against the hilt of his sword, and he gave all the appearance of another knight in dutiful reflection of the coming crusade. In truth, he dwelled in memories. His thoughts flew back to a world that hated him.

Tsagualsa.

The name brought a sneer to his lips, hidden by the hood that cast his features into shadow. Tsagualsa, a dead world the Night Lords claimed as their own; a world where primarchs had been reduced to screaming brothers, and the foundations of a fortress would one day rise to become an enemy stronghold.