The Horus Heresy: Vengeful Spirit

The Deathshroud spread out as their sweep of the chamber reached the impregnable vault at its end. Sealed with locks of magnificent complexity, the gene-vault was a place of mystery and a repository of the Death Guard’s future.

Caipha Morarg, late of 24th Breacher Squad, now serving as Mortarion’s equerry, shook his head and put up his bolter as he followed his master into the apothecarion.

‘My lord, there’s no one here,’ he said.

‘There is, Caipha,’ said Mortarion, his voice the breath of a parched desert wind. ‘I can feel it.’

‘We’ve swept the deck from end to end and side to side,’ reaffirmed Morarg. ‘If there was something here, we’d already have found it.’

‘There’s still one place to look,’ said Mortarion.

Morarg followed the primarch’s gaze.

‘The gene-vault?’ he said. ‘It’s void-hardened and energy shielded. It’s a wonder the damn Apothecaries can get in.’

‘Do you doubt me, Caipha?’ whispered Mortarion.

‘Never, my lord.’

‘And have you ever known me to be wrong in such matters?’

‘No, my lord.’

‘Then trust me when I say there’s something in there.’

‘Something?’

Mortarion nodded, and he canted his head to one side, as though listening to sounds only he could hear. The muscles in his face twitched, but with the gorget obscuring his jaw, it was impossible to be certain what expression he made.

‘Open the door,’ he ordered, and a gaggle of hazard-suited Legions serfs ran to it with pneumatic key-drivers and one-time cipher code wands. They inserted the power-keys, but before any were engaged, a green-cloaked Apothecary approached Mortarion under the watchful gaze of the Deathshroud.

‘My lord,’ said the Apothecary. ‘I beg you to reconsider.’

‘What is your name?’ asked Mortarion.

‘Koray Burcu, my lord.’

‘We have just breached Molech’s system edge, Apothecary Burcu, and there is an intruder aboard the Endurance,’ said Mortarion. ‘It is behind that door. I require you to open it. Now.’

Koray Burcu wilted under Mortarion’s gaze, but to his credit, the Apothecary stood his ground.

‘My lord, please,’ said Burcu. ‘I implore you to withdraw from the apothecarion. The gene-vault must be kept sterile and at positive pressure. This entire stock of gene-seed is at risk of contamination if the door is opened even a fraction.’

‘Nevertheless, you will do as I order,’ said Mortarion. ‘I can do it without you, Apothecary, but it will take time. And in that time, what do you think an intruder might be doing in there?’

Burcu considered the primarch’s words and made his way to the gleaming vault door. Numerous key-drivers turned simultaneously under Burcu’s direction as he wanded a helix-code unique to this moment and which would change immediately upon the door’s opening.

The door split at its junction with the wall and a blast of frozen, sharp-edged air escaped from within. Mortarion felt it cut the skin of his face, relishing the needle-like jab of cold. The door swung wider and the hazard-suited thralls withdrew as the reek of preserving chemicals and frost-resistant power cells tainted the air with bio-mechanical flavours. Mortarion tasted something else on the air, a fetor of something so lethal that only one such as he could authorise its release.

But such things were stored in the deepest magazines, locked away in vaults even more secure than this.

‘Touch nothing,’ warned Burcu, moving ahead of the Deathshroud as they stepped over the high threshold of the gene-vault.

Mortarion turned to Morarg and said, ‘Seal the door behind me, and only open it again on my express order.’

‘My lord?’ said Morarg. ‘After Dwell, my place is at your side!’

‘Not this time,’ said Mortarion and his meaning was ironclad.

Devotion to duty clamped down on Morarg’s next words and he nodded stiffly as Mortarion turned and followed Koray Burcu into the vault. No sooner was Mortarion inside than the heavy adamantium door swung closed.

The space within was a hundred metre square vault of frost-white and gleaming silver. Shielded banks of gurgling cryo-tubes lined the walls, and rows of centrifuge drums formed a central aisle.

Illuminated sigils and runic inscriptions of genetic purity flickered on brass-rimmed data-slates, and Mortarion extrapolated mental maps of the gene-code fragments. Here was a collection of mucranoids, there a chemical bath of zygotes that would one day be a Betcher’s Gland. Behind them, bubbling cylinders of eyeballs.

Half-formed organs floated in gestation tanks and puffs of vapour from humming condensers filled the air with chill moisture that crunched underfoot in microscopic ice crystals. Koray Burcu claimed the atmosphere within the vault was sterile, but such was not the case. The air vibrated with potential, a thing pressing itself upon the fabric of reality like a newborn in a rupturing birth sac.

Only he could feel it. Only he knew what it was.