"The Omnissiah has many forms," said Eunicornus. "Here they are worshiped in their aspect of the Motive Force."
This was a holy place, after all. It was also a laboratory. It did not study the in blueprints and glowing vats, not in cogitators or plasma coils. It was studied in the relationship of muscle and metal, of charge and negation. Everywhere there were duelist skitarii moving through the steps of martial forms, stance and counterstance, surrounded by clouds of servo skulls taking 3D renders of the tiniest movements. There were hundreds of salt circles filled with a thousand cyborgs. Some have the hulking, skeletal structure of simulated orks; others are low and skittering in mechanical replication of the Tyranid hives. It felt heretical to see sacred machines twisted into the forms of xenos - some Inquisitors would order this place condemned for that alone. But the research was conducted in the open, blessed by the Archmagi, and with results that were essential for the development of Sicarian legions.
"While martial arts are plentiful for humans fighting against humans," said Eunicornus, leading through the battling arrays, the whirr of transonic weaponry. "Fewer exist for humans to fight the alien. Traditional martial training left the Skitarii vulnerable during the war against Porphyrios. The survivors of those battles were taken here, had their cognitive implants extracted and duplicated and cross-referenced to form complete 3-D models of enemy bioforms. Once martial techniques have been developed for optimized battle against the Hive Fleet they will be distributed amongst all major forgeworlds, and the prestige of the Isohedron will grow."
Live weapons were used. Could it be any other way? Mercy could not be shown, even to training dummies. A Sicarian whirls and slices apart a Warrior form, not ceasing its butchery until a scanner skull's eye blinked green. Immediately it stopped and folded its blades underneath its ragged cloak as a pair of lobotomized slaves emerged to haul the broken wreckage to one of the endless charnel pipes.
Virgid, you know where those pipes lead. The same place as the garbage chute in the Archmagos' sanctum: the Lair of the Necromechanic, Magos Stoll. A vast hell of death and industry, a lightless place of fire and smoke, lit by the cascading sheets of arc-cutter sparks and the endless churning maw of industry. This is where you conducted the vast majority of your training: Working in nightmare conditions, shoulder to shoulder with hunched priests of the dark, working to fix all of the Imperium's broken machines as corpses rained down from overhead. You not only learned how to repair complex devices under the eerie spider-eyes of the Magos, but to do so in the hardest conditions imaginable. You were glad to be free of the place.
"Of course, the Isohedron is also researching a variety of Xenos foes..." said Eunicornus. They stopped by an uncanny figure - a tall and slender battle robot. Its arms were too long, its helmet was too long, its posture implied a center of balance that was not right for a human. It stood languidly above the bodies of three Sicarians, tracing a gentle figure of eight in the ground with its blade.
You could have sworn it tilted its head in recognition.
"... but due to available data, the Swarm is the focus right now," said Eunicornus, shaking their head and moving on. "Yesterday's war, but better to record everything so we do not forget. Though, I wonder..."
[Reassurance] Eunicornus isn't going openly to point the finger at ZBD_ZEN. ZEN is their instructor in this place, and a certain loyalty and respect is required. It's clear that they're suspicious too, but you get the feeling that Eunicornus is the 'do my own investigation, and if I think that ZEN is guilty duel them to the death myself' type. Honour, in the shadows - the Dark Angel way.
[Flirting] They're not taking their helmet off because they're ~too pretty~
[Military Science] For all their talk of the Necron menace, it is clear that Eunicornus thinks the Aeldari menace is the true threat. The place of prominence on their armour, the Aeldari gemstone trophy - even thinking about it, there were notes in your duel that indicate that they had been practicing against exceptionally maneuverable foes and were unprepared for brute force attacks. There is no data backing this up; the Aeldari have not been seen in the sector for years.