Conceptart : Warhammer 40K "Yamnin Inquisition - Eversor Temple: Embroidered Uniform Assassin"

During Yamnin’s early expansionary age, both an Assassinarium and an Iverson Temple already existed. Cut off from the wider Imperium for millennia, Yamnin’s Assassinarium was forced to become an isolated, singular institution. Beyond the conservative duty of watching for heresy and rebellion among the system’s populace, the Assassinarium’s true obsession was the secret concealed at the heart of Yamnin’s central city spire — a secret zealously guarded by the line of planetary governors for generations. Decades and generations of clandestine surveillance revealed only one link: Jaghatai Khan and his Keshig bodyguard. What lay behind that link the assassins could not conclusively learn, but they were certain whatever it was could be heresy, or a threat to the Imperium. The Khan and the governor family were therefore suspected as tainted.

For centuries the Assassinarium bred a cadre unique to Yamnin: assassins of the Iverson Temple known locally as the Embroidered-Uniform Assassins. Trained in isolation and never relinquishing their primary role to strike down confirmed heretics, their greater purpose was to hold the single, decisive ace—an operative capacity reserved for the time when Jaghatai Khan or the governor line could be eliminated.

The Yamnin system sits at the rim and for ten thousand years has been cut off from the wider galactic lanes; after the Great Rift it became ringed by the warp. As a result, the Embroidered-Uniform Assassins differ markedly from mainland Iverson Temple killers. They wear synskin bodysuits beneath a distinctly Yamnin warcoat embroidered with the planet’s sacred dragon motif; the coat’s chest is reinforced with admech-worked adamantium-scaled armor. Long severance from the Imperium’s manufactoria means they lack modern neuro-gauntlets. In their stead they field adamantium spring-knives—embroidered, toxin-ready blades—and retain the Executioner Pistol. Their most singular weapon is a levitating circular device known as the Flying Guillotine: multiple rotating adamantium blades mounted on a hovering disc, tethered by spool-fed electrum lines. With a deft single-hand manipulation an assassin can command two Flying Guillotines to sever heads in lightning strikes, employ them simultaneously for offense and parry, or detonate them as a final, deadly gambit. It is an assassination tool forged for both attack and defense.

The Assassinarium’s conviction that the governor line was tainted hardened into doctrine. When Abaddon’s overwhelming host of Chaos warfleets finally struck Yamnin, the planet fell into a desperate, grinding retreat to the citadel’s inner sanctum. Even as the city burned, the Assassinarium ordered a five-person Embroidered-Uniform strike team to infiltrate the heart and execute the governor, his retainers, the last elite Yamnin Dragon Fortress Guard, and the handful of troops resolved to stand and die.

But one of the Embroidered-Uniform Masters, secretly watching the governor for years, broke with the Assassinarium’s edict at the last, choosing to disobey. He led the five assassins onto the field before the final door and, with a look, told the governor that the five would cover his withdrawal — to buy time so the governor, the remaining defenders, and sacred blood-wardens like Kor’sarro Khan and Dante could fall back into the secret chamber that sheltered the network-gate to Terra.

Before the admech lock could be sealed and the adamantium portal gate slammed, those inside watched an execution of combat both balletic and lethal. The five assassins gave their lives to hold back swathes of Chaos veterans long enough for the defenders to reorganize at the gate. Even Abaddon himself was struck by multiple adamantium embroidered spring-knives; absent daemonic succor and regeneration, the Warmaster would surely have bled out. Instead, Abaddon forced the door and spilled in. The sacrifice of the Yamnin Embroidered-Uniform Assassins earned even Kor’sarro Khan’s reverent respect.