The First Heretic

The war machines and expert technical crews of Carthage Cohort were spread across the many Word Bearers fleets, rather than housed on their own Mechanicum vessels the way the Titan Legions were. Lorgar’s own insistence made it thus. Decades before, when the Legio Cybernetica had first approached the Word Bearer lord, Lorgar had generously offered to modify his vessels to accommodate the specialist needs of his new Mechanicum allies.

‘We are all brothers under the same god’s gaze,’ he’d said to the Fabricator-General, during his first visit to the surface of Mars. Apparently, a concordance was reached soon after. The Carthage Cohort, one of Cybernetica’s proudest armies, would march with the XVII Legion, and dwell in the bowels of their vessels.

Xi-Nu 73 had not been present at the time this ancient oath was sworn – had not even been flesh-born back then – and this contributed to his doubts about the tale’s veracity. The reason it never cogitated as pure truth to Xi-Nu’s perceptions was simple: despite how useful the Carthage Cohort was to the Word Bearers Legion, the Astartes simply did not like the Mechanicum element in their midst. Relations were closer to cold than cordial, even taking the Mechanicum’s inhumanity into consideration.

It was said other Legions worked more harmoniously with the Martian Cybernetica cult, especially the blessed Iron Hands and unbreakable Iron Warriors – both of whom enjoyed the Mechanicum’s immense (and immensely valuable) respect from the first days their forces joined together in the Terran Emperor’s crusade.

But over time, Xi-Nu 73 – who had most humbly risen to oversee a maniple of four robots – came to realise that the Word Bearers were not like their Astartes brothers. It was an opinion shared by others of his rank, on those increasingly rare occasions he established contact with them.

As the fleets moved farther and farther apart since the last grand gathering at Colchis three years before, so too did contact between the Carthage maniples wane. Vox-signals would never reach across such distances. Even astropathy was rumoured to be becoming unreliable – not that Xi-Nu 73 had access to such a talent.

Xi-Nu 73’s principal problem where the Word Bearers were concerned was their fundamental organic nature. In short, they were too human. They valued the flawed aspects of faith, focusing on the flesh and the soul, rather than transcendence through oneness with the Machine-God. They were fuelled by emotion, rather than logic, which affected their tactical decisions and their very goals in the Great Crusade.

Most tellingly of all, many of the Serrated Sun’s warriors seemed uncomfortable around the Mechanicum adepts themselves, as if forever on the edge of voicing some accusation, or framing a grievous complaint.

Too human. That was the problem. Too emotional, too driven by instinctive faith and eloquent diction. Too human, resulting in distance between the factions.

The exception to this distance was a source of disquiet for Xi-Nu 73, because the exception was his own Conqueror Primus.

Incarnadine, blessings upon its brave soul, was sincerely respected by the Word Bearers.

Indeed, they called it ‘Brother’.

He led the Astartes into the preparatory chamber, where his wards were undergoing the final rituals before reawakening. The three armoured machines stood in impassive silence, doted on by Mechanicum menials, all under Xi-Nu 73’s command. Two of the robed attendants were lifting Vermillion’s back-mounted lascannon, hefting it up along its greased runner track, testing the smoothness of motion as they brought it up to the firing position on the Cataphract’s shoulder.

Sanguine, the gangly Crusader-class twin to Alizarin, was almost ready. The juddering clank of autoloaders filled the chamber as its shoulder cannon was fed fresh stores of ammunition. Servitors oiled its joints, only allowed near the war machine now that the vital work was complete.

Incarnadine was waiting for them.

That fact brought a stab of irritatingly human unease to Xi-Nu 73’s thought processes. The robot’s combat wetware was about to be installed, and then Incarnadine would be ready for deployment. But there it was: the anomalous reading in its brain patterns. An attention spike in the otherwise flat-lining rumble of its cognition. This flare of perception, along with the faintest adjustment of its visual receptors, only ever occurred in the presence of Word Bearers.

Like an animal instinctively recognising its kin, Incarnadine knew when warriors of the XVII Legion were near.

This was why Xi-Nu 73’s pride was tainted. The robot’s cortex shouldn’t have allowed for this level of recognition without its combat wetware installed. It shouldn’t be able to distinguish between targets and non-targets – seeing no difference between Astartes, human soldiers, aliens, or anything else.